Occupational Therapy: Kinesiological Analysis of Tying a Ponytail

This assignment provides a detailed kinesiological analysis of the steps involved in tying a ponytail, breaking down each movement into specific joint actions and muscle contractions. It begins by outlining the four main steps: reaching for the hair-tie, grasping the hair-tie, grabbing the hair, and encircling the hair-tie. Each step is further analyzed to identify the specific joint movements, such as shoulder flexion, medial rotation, scapular protraction, forearm pronation, elbow extension, and finger extension. The analysis includes the muscles involved in each movement through concentric and eccentric contractions. Grasp patterns, like the cylindrical grasp, are also described with the respective muscle actions at the MCP, PIP, and DIP joints, as well as wrist and shoulder movements. The assignment provides a comprehensive understanding of the biomechanics involved in this common daily task, making it a valuable resource for occupational therapy students. Desklib offers a range of similar solved assignments and study tools.

Running head: OCCUPATIONAL THERAPY
OCCUPATIONAL THERAPY
Name of the Student:
Name of the University:
Author Note:

1OCCUPATIONAL THERAPY
Tying a ponytail involves three steps. The first step is to reach for the hair-tie with the
right arm. The second step is to grasp the hair tie in cylindrical grasp. The third step is to grab all
the hair in palm to half-way the length of the crown. The fourth step is to, put the accumulated
hair inside the hair tie and then encircle the hair-tie till sufficient tightening of the tie is achieved.
The first step involves extending the right arm and reaching for the hair tie. The motion
involved in shoulder-flexion at the Glenohumeral joint. It further involves concentric contraction
of anterior deltoid, Pec Major and Coracobrachialis and Biceps. The next motion is the slight
medial rotation of the humerus of the GH joint. This involves concentric contraction of anterior
Deltoid, Latissimus Dorsi, Teres Major, Subscapularis and Pectoralis major. The next motion is
the scapular protraction that includes the concentric contraction of serratus anterior and
pectoralis minor. The next motion is the pronation of the forearm at the proximal and distal
radioulnar joints. It involves the concentric contraction of pronator Teres and Pronator
Quadratus. The next motion is the elbow extension at the elbow which includes the eccentric
contraction of the Biceps branci and anconeus. The final motion is the finger extension from
flexion at the digits 2-5 of the MCP, PIP, DIP joints. This includes, concentric contraction of
extensor digiterum, extensor Indicis and Extensor Minimi. The second step includes the
cylindrical grasp on the hair tie that involves finger flexion from extension at the MCP, PIPand
DIP joints. It involves concentric contraction of Flexor Digitorum, superficialis, flexor
Digitorum profundus, flexor digiti minimi brevis. The next step is wrist flexion at the radiocarpel
joint which includes concentric contraction of flexor carpi, radialis, flexor carpi,ulnaris, Palmaris
longus. The third motion is the shoulder flexion at the GH joint which includes concentric
contraction of the anterior Deltoid, Biceps Branchi, Pectoralis Major and Coracobranchailis. The
motion is the shoulder elevation at the scapulothoracic joint. It includes concentric contraction at

2OCCUPATIONAL THERAPY
the Trapezius, rhomboid major, rhomboid minor and Levator scapula. The next movementis the
shoulder abduction at the GH joint which includes concentric contraction of all the deltoid and
supraspinatus. The next movement is the scapular retraction at the GH joint. It involves
concentric contraction at the Trapezius, Rhomboid major and minor. The next steps include
elbow flexion from extension at the elbow. The next movement is the forearm spination to
neutral position. The next movement is the wrist extension from flexion and finger flexion at
MCP, PIP and DIP. The last step includes shoulder abduction, shoulder depression at the
scapulothoracic joint and elbow flexion. It also involves wrist flexion and finger flexion.