Ali Hussaini - Academia.edu (original) (raw)

Papers by Ali Hussaini

Research paper thumbnail of Control options for upper limb externally powered components

American Academy of Orthopaedic Surgeons, Sep 7, 2018

Research paper thumbnail of 843779_Appendix_A2_RCRT_GradingCompensations_(2) – Supplemental material for Clinical evaluation of the refined clothespin relocation test: A pilot study

Supplemental material, 843779_Appendix_A2_RCRT_GradingCompensations_(2) for Clinical evaluation o... more Supplemental material, 843779_Appendix_A2_RCRT_GradingCompensations_(2) for Clinical evaluation of the refined clothespin relocation test: A pilot study by Ali Hussaini, Wendy Hill and Peter Kyberd in Prosthetics and Orthotics International

Research paper thumbnail of 843779_A3_supp_mat – Supplemental material for Clinical evaluation of the refined clothespin relocation test: A pilot study

Supplemental material, 843779_A3_supp_mat for Clinical evaluation of the refined clothespin reloc... more Supplemental material, 843779_A3_supp_mat for Clinical evaluation of the refined clothespin relocation test: A pilot study by Ali Hussaini, Wendy Hill and Peter Kyberd in Prosthetics and Orthotics International

Research paper thumbnail of 843779_A1_supp_mat – Supplemental material for Clinical evaluation of the refined clothespin relocation test: A pilot study

Supplemental material, 843779_A1_supp_mat for Clinical evaluation of the refined clothespin reloc... more Supplemental material, 843779_A1_supp_mat for Clinical evaluation of the refined clothespin relocation test: A pilot study by Ali Hussaini, Wendy Hill and Peter Kyberd in Prosthetics and Orthotics International

Research paper thumbnail of Upper limb control options for externally powered components

The control of externally powered arm prostheses requires inputs from the body to be converted in... more The control of externally powered arm prostheses requires inputs from the body to be converted into electrical signals that can be interpreted by an electronic controller. The role of the clinical team is to match the control strategy of the prosthesis to the capabilities and needs of the individual user. There are many types of input forms (electromyography, linear potentiometers, force-sensing resistors and servos) and many types of control strategies (single-site, dual-site, and switching) available to meet the individualized needs of prosthesis users. Newer forms of input and control, such as implantable electrodes and the recognition of patterns of muscle activity, have the potential to expand the capabilities of computer-based controllers.

Research paper thumbnail of Characterisation of the Clothespin Relocation Test as a functional assessment tool

Journal of Rehabilitation and Assistive Technologies Engineering, 2018

Method: The Clothespin Relocation Test has been adapted from an arm training tool to create an in... more Method: The Clothespin Relocation Test has been adapted from an arm training tool to create an instrument to measure hand function. It is based on the time to move three clothespins from a horizontal to a vertical bar, and back. To be generally useful, the measures need to have their psychometric properties investigated. This paper measures the characteristics of an able-bodied population to gain an understanding of the underlying statistical properties of the test, in order that it can then be used to compare with different subject groups. Fifty adults (29 males, 21 females, mean age 31) were tested with five runs of three clothespins moved up and then down. Ten subjects returned twice more to observe repeatability. Results: There was a non-Gaussian range of times, from 2.5 to 7.37 s. Mean time for Up was 4.1 s, and was 4.0 s for Down, with a skew towards the faster times of 0.57 for Up and 0.97 for Down. Over the three sessions there was a small (not significant) increase in speed 4.1 AE 0.5 s first run Down to 3.5 AE 0.4 s for third. Conclusion: These initial tests confirm that it has potential to be used as a measurement of the performance of arm movement.

Research paper thumbnail of Clinical evaluation of the refined clothespin relocation test

Prosthetics & Orthotics International, 2019

Background: The refined clothespin relocation test is a test used to evaluate the performance of ... more Background: The refined clothespin relocation test is a test used to evaluate the performance of a prosthesis user by analysing the compensatory motions and time to complete a grasping and placement exercise. The test has been studied previously with a motion capture laboratory and has now been adapted for a clinical setting. A comparison of prosthesis user to an able-bodied group is needed to determine efficacy as an assessment tool. Objective: To modify the previous refined clothespin relocation test and assess whether it can distinguish between able-bodied and prosthesis users. Study design: Comparative analysis. Methods: Forty-two able-bodied subjects and three prosthesis users completed the adapted refined clothespin relocation test protocol. Average refined clothespin relocation test scores describing the degree of compensatory movements and the time to complete the protocol were compared using a Mann–Whitney U-test. Results: A significant difference was found in the refined c...

Research paper thumbnail of Categorization of compensatory motions in transradial myoelectric prosthesis users

Prosthetics & Orthotics International, 2017

Background: Prosthesis users perform various compensatory motions to accommodate for the loss of ... more Background: Prosthesis users perform various compensatory motions to accommodate for the loss of the hand and wrist as well as the reduced functionality of a prosthetic hand. Objectives: Investigate different compensation strategies that are performed by prosthesis users. Study design: Comparative analysis. Methods: A total of 20 able-bodied subjects and 4 prosthesis users performed a set of bimanual activities. Movements of the trunk and head were recorded using a motion capture system and a digital video recorder. Clinical motion angles were calculated to assess the compensatory motions made by the prosthesis users. The video recording also assisted in visually identifying the compensations. Results: Compensatory motions by the prosthesis users were evident in the tasks performed (slicing and stirring activities) as compared to the benchmark of able-bodied subjects. Compensations took the form of a measured increase in range of motion, an observed adoption of a new posture during ...

Research paper thumbnail of Refined clothespin relocation test and assessment of motion

Prosthetics & Orthotics International, 2017

Background: Advancements in upper limb prosthesis design have focused on providing increased degr... more Background: Advancements in upper limb prosthesis design have focused on providing increased degrees of freedom for the end effector through multiple articulations of a prosthetic hand, wrist and elbow. Measuring improvement in patient function with these devices requires development of appropriate assessment tools. Objectives: This study presents a refined clothespin relocation test for measuring performance and assessing compensatory motion between able-bodied subjects and subjects with upper limb impairments. Study design: Comparative analysis. Methods: Trunk and head motions of 13 able-bodied subjects who performed the refined clothespin relocation test were compared to the motion of a transradial prosthesis user with a single degree of freedom hand. Results: There were observable differences between the prosthesis user and the able-bodied group. The assessment used provided a clear indication of the differences in motion through analysis of compensatory motion. Conclusion: The ...

Research paper thumbnail of Socio-economic Assessment of Ginger Production in Jaba Local Government Area of Kaduna State, Nigeria

Asian Journal of Agricultural Extension, Economics & Sociology, 2017

Ginger (Zingiber officinale Roscoe) is an herbaceous perennial plant belonging to the Order Scita... more Ginger (Zingiber officinale Roscoe) is an herbaceous perennial plant belonging to the Order Scitamineae and the family Zingiberaceae. It is used for both medicinal and culinary purposes. it is a root crop and a typical herb extensively grown across the world for its pungent aromatic underground stem and rhizome which make it an important export commodity in the world trade. Ginger's origin is not well established though it is generally thought to be native of Asia, where it was first cultivated. It was also cultivated in tropical regions of America.

Research paper thumbnail of Efficient and green sulfamic acid catalyzed synthesis of new 1,2-dihydroquinazoline derivatives with antibacterial potential

Arabian Journal of Chemistry, 2015

Research paper thumbnail of Amberlite IR-120H, an efficient and recyclable solid phase catalyst for the synthesis of quinoxalines: A greener approach

Tetrahedron Letters, 2015

Research paper thumbnail of Day-case septoplasty: a default pathway or is case selection the key?

European Archives of Oto-Rhino-Laryngology, 2014

Research paper thumbnail of Prediction of 10-year coronary heart disease risk in Caribbean type 2 diabetic patients using the UKPDS risk engine

International journal of …, 2009

Objective: Primary prevention of Coronary Heart Disease (CHD) in diabetic patients should be base... more Objective: Primary prevention of Coronary Heart Disease (CHD) in diabetic patients should be based on absolute CHD risk calculation. This study was aimed to determine the levels of 10-year CHD risk in Caribbean type 2 diabetic patients using the diabetes specific United Kingdom Prospective Diabetes Study (UKPDS) risk engine calculator. Subjects and methods: Three hundred and twenty-five (106 males, 219 females) type 2 diabetic patients resident in two Caribbean Islands of Tobago and Trinidad met the UKPDS risk engine inclusion criteria. Records of their sex, age, ethnicity, smoking habit, diabetes duration, systolic blood pressure, total cholesterol, HDL-cholesterol and glycated haemoglobin were entered into the UKPDS risk engine calculator programme and the absolute 10-year CHD and stroke risk levels were computed. The 10-year CHD and stroke risks were statistically stratified into b 15%, 15-30% and N 30% CHD risk levels and differences between patients of African and Asian-Indian origin were compared. Results: In comparison with patients in Tobago, type 2 diabetic patients in Trinidad, irrespective of gender, had higher proportion of 10-year CHD risk (10.4 vs. 23.6%, P b 0.001) whereas the overall 10-year stroke risk prediction was higher in patients resident in Tobago (16.9 vs. 11.4%, P b 0.001). Ethnicity-based analysis revealed that irrespective of gender, higher proportion of patients of Indian origin scored N 30% of absolute 10-year CHD risk compared with patients of African descent (3.2 vs. 28.2%, P b 0.001). Conclusions: The results of the study identified diabetic patients resident in Trinidad and patients of Indian origin as the most vulnerable groups for CHD. These groups of diabetic patients should have priority in primary or secondary prevention of coronary heart disease.

Research paper thumbnail of Control options for upper limb externally powered components

American Academy of Orthopaedic Surgeons, Sep 7, 2018

Research paper thumbnail of 843779_Appendix_A2_RCRT_GradingCompensations_(2) – Supplemental material for Clinical evaluation of the refined clothespin relocation test: A pilot study

Supplemental material, 843779_Appendix_A2_RCRT_GradingCompensations_(2) for Clinical evaluation o... more Supplemental material, 843779_Appendix_A2_RCRT_GradingCompensations_(2) for Clinical evaluation of the refined clothespin relocation test: A pilot study by Ali Hussaini, Wendy Hill and Peter Kyberd in Prosthetics and Orthotics International

Research paper thumbnail of 843779_A3_supp_mat – Supplemental material for Clinical evaluation of the refined clothespin relocation test: A pilot study

Supplemental material, 843779_A3_supp_mat for Clinical evaluation of the refined clothespin reloc... more Supplemental material, 843779_A3_supp_mat for Clinical evaluation of the refined clothespin relocation test: A pilot study by Ali Hussaini, Wendy Hill and Peter Kyberd in Prosthetics and Orthotics International

Research paper thumbnail of 843779_A1_supp_mat – Supplemental material for Clinical evaluation of the refined clothespin relocation test: A pilot study

Supplemental material, 843779_A1_supp_mat for Clinical evaluation of the refined clothespin reloc... more Supplemental material, 843779_A1_supp_mat for Clinical evaluation of the refined clothespin relocation test: A pilot study by Ali Hussaini, Wendy Hill and Peter Kyberd in Prosthetics and Orthotics International

Research paper thumbnail of Upper limb control options for externally powered components

The control of externally powered arm prostheses requires inputs from the body to be converted in... more The control of externally powered arm prostheses requires inputs from the body to be converted into electrical signals that can be interpreted by an electronic controller. The role of the clinical team is to match the control strategy of the prosthesis to the capabilities and needs of the individual user. There are many types of input forms (electromyography, linear potentiometers, force-sensing resistors and servos) and many types of control strategies (single-site, dual-site, and switching) available to meet the individualized needs of prosthesis users. Newer forms of input and control, such as implantable electrodes and the recognition of patterns of muscle activity, have the potential to expand the capabilities of computer-based controllers.

Research paper thumbnail of Characterisation of the Clothespin Relocation Test as a functional assessment tool

Journal of Rehabilitation and Assistive Technologies Engineering, 2018

Method: The Clothespin Relocation Test has been adapted from an arm training tool to create an in... more Method: The Clothespin Relocation Test has been adapted from an arm training tool to create an instrument to measure hand function. It is based on the time to move three clothespins from a horizontal to a vertical bar, and back. To be generally useful, the measures need to have their psychometric properties investigated. This paper measures the characteristics of an able-bodied population to gain an understanding of the underlying statistical properties of the test, in order that it can then be used to compare with different subject groups. Fifty adults (29 males, 21 females, mean age 31) were tested with five runs of three clothespins moved up and then down. Ten subjects returned twice more to observe repeatability. Results: There was a non-Gaussian range of times, from 2.5 to 7.37 s. Mean time for Up was 4.1 s, and was 4.0 s for Down, with a skew towards the faster times of 0.57 for Up and 0.97 for Down. Over the three sessions there was a small (not significant) increase in speed 4.1 AE 0.5 s first run Down to 3.5 AE 0.4 s for third. Conclusion: These initial tests confirm that it has potential to be used as a measurement of the performance of arm movement.

Research paper thumbnail of Clinical evaluation of the refined clothespin relocation test

Prosthetics & Orthotics International, 2019

Background: The refined clothespin relocation test is a test used to evaluate the performance of ... more Background: The refined clothespin relocation test is a test used to evaluate the performance of a prosthesis user by analysing the compensatory motions and time to complete a grasping and placement exercise. The test has been studied previously with a motion capture laboratory and has now been adapted for a clinical setting. A comparison of prosthesis user to an able-bodied group is needed to determine efficacy as an assessment tool. Objective: To modify the previous refined clothespin relocation test and assess whether it can distinguish between able-bodied and prosthesis users. Study design: Comparative analysis. Methods: Forty-two able-bodied subjects and three prosthesis users completed the adapted refined clothespin relocation test protocol. Average refined clothespin relocation test scores describing the degree of compensatory movements and the time to complete the protocol were compared using a Mann–Whitney U-test. Results: A significant difference was found in the refined c...

Research paper thumbnail of Categorization of compensatory motions in transradial myoelectric prosthesis users

Prosthetics & Orthotics International, 2017

Background: Prosthesis users perform various compensatory motions to accommodate for the loss of ... more Background: Prosthesis users perform various compensatory motions to accommodate for the loss of the hand and wrist as well as the reduced functionality of a prosthetic hand. Objectives: Investigate different compensation strategies that are performed by prosthesis users. Study design: Comparative analysis. Methods: A total of 20 able-bodied subjects and 4 prosthesis users performed a set of bimanual activities. Movements of the trunk and head were recorded using a motion capture system and a digital video recorder. Clinical motion angles were calculated to assess the compensatory motions made by the prosthesis users. The video recording also assisted in visually identifying the compensations. Results: Compensatory motions by the prosthesis users were evident in the tasks performed (slicing and stirring activities) as compared to the benchmark of able-bodied subjects. Compensations took the form of a measured increase in range of motion, an observed adoption of a new posture during ...

Research paper thumbnail of Refined clothespin relocation test and assessment of motion

Prosthetics & Orthotics International, 2017

Background: Advancements in upper limb prosthesis design have focused on providing increased degr... more Background: Advancements in upper limb prosthesis design have focused on providing increased degrees of freedom for the end effector through multiple articulations of a prosthetic hand, wrist and elbow. Measuring improvement in patient function with these devices requires development of appropriate assessment tools. Objectives: This study presents a refined clothespin relocation test for measuring performance and assessing compensatory motion between able-bodied subjects and subjects with upper limb impairments. Study design: Comparative analysis. Methods: Trunk and head motions of 13 able-bodied subjects who performed the refined clothespin relocation test were compared to the motion of a transradial prosthesis user with a single degree of freedom hand. Results: There were observable differences between the prosthesis user and the able-bodied group. The assessment used provided a clear indication of the differences in motion through analysis of compensatory motion. Conclusion: The ...

Research paper thumbnail of Socio-economic Assessment of Ginger Production in Jaba Local Government Area of Kaduna State, Nigeria

Asian Journal of Agricultural Extension, Economics & Sociology, 2017

Ginger (Zingiber officinale Roscoe) is an herbaceous perennial plant belonging to the Order Scita... more Ginger (Zingiber officinale Roscoe) is an herbaceous perennial plant belonging to the Order Scitamineae and the family Zingiberaceae. It is used for both medicinal and culinary purposes. it is a root crop and a typical herb extensively grown across the world for its pungent aromatic underground stem and rhizome which make it an important export commodity in the world trade. Ginger's origin is not well established though it is generally thought to be native of Asia, where it was first cultivated. It was also cultivated in tropical regions of America.

Research paper thumbnail of Efficient and green sulfamic acid catalyzed synthesis of new 1,2-dihydroquinazoline derivatives with antibacterial potential

Arabian Journal of Chemistry, 2015

Research paper thumbnail of Amberlite IR-120H, an efficient and recyclable solid phase catalyst for the synthesis of quinoxalines: A greener approach

Tetrahedron Letters, 2015

Research paper thumbnail of Day-case septoplasty: a default pathway or is case selection the key?

European Archives of Oto-Rhino-Laryngology, 2014

Research paper thumbnail of Prediction of 10-year coronary heart disease risk in Caribbean type 2 diabetic patients using the UKPDS risk engine

International journal of …, 2009

Objective: Primary prevention of Coronary Heart Disease (CHD) in diabetic patients should be base... more Objective: Primary prevention of Coronary Heart Disease (CHD) in diabetic patients should be based on absolute CHD risk calculation. This study was aimed to determine the levels of 10-year CHD risk in Caribbean type 2 diabetic patients using the diabetes specific United Kingdom Prospective Diabetes Study (UKPDS) risk engine calculator. Subjects and methods: Three hundred and twenty-five (106 males, 219 females) type 2 diabetic patients resident in two Caribbean Islands of Tobago and Trinidad met the UKPDS risk engine inclusion criteria. Records of their sex, age, ethnicity, smoking habit, diabetes duration, systolic blood pressure, total cholesterol, HDL-cholesterol and glycated haemoglobin were entered into the UKPDS risk engine calculator programme and the absolute 10-year CHD and stroke risk levels were computed. The 10-year CHD and stroke risks were statistically stratified into b 15%, 15-30% and N 30% CHD risk levels and differences between patients of African and Asian-Indian origin were compared. Results: In comparison with patients in Tobago, type 2 diabetic patients in Trinidad, irrespective of gender, had higher proportion of 10-year CHD risk (10.4 vs. 23.6%, P b 0.001) whereas the overall 10-year stroke risk prediction was higher in patients resident in Tobago (16.9 vs. 11.4%, P b 0.001). Ethnicity-based analysis revealed that irrespective of gender, higher proportion of patients of Indian origin scored N 30% of absolute 10-year CHD risk compared with patients of African descent (3.2 vs. 28.2%, P b 0.001). Conclusions: The results of the study identified diabetic patients resident in Trinidad and patients of Indian origin as the most vulnerable groups for CHD. These groups of diabetic patients should have priority in primary or secondary prevention of coronary heart disease.