Occupational Therapist Test Biomechanics and Kinesiology 3

Question 1

Arthrokinematics refers to:

Accepted Answer

Accessory motions occurring at joint surfaces during osteokinematic movement

Answer

Measurement of joint angles using a goniometer

Answer

The study of muscle forces acting across a joint

Answer

Nerve conduction velocity changes with joint position

Question 2

A 'force couple' in biomechanics refers to:

Accepted Answer

Two equal and opposite forces acting on opposite sides of an axis to produce pure rotation

Answer

Two muscles contracting simultaneously in the same direction

Answer

A single muscle generating both compressive and shear forces

Answer

Co-activation of agonist and antagonist muscles

Question 3

The 'lumbrical grip' is characterized by:

Accepted Answer

MCP joint flexion combined with IP joint extension, used for holding flat objects

Answer

Power grip using all digits wrapped around a cylindrical object

Answer

Lateral pinch between the thumb pad and radial side of the index finger

Answer

Tripod pinch using thumb, index, and middle fingertips

Question 4

In open kinetic chain (OKC) exercise, which segment characteristic defines the movement?

Accepted Answer

The distal segment is free to move while the proximal segment remains relatively fixed

Answer

The proximal segment is free to move while the distal segment is fixed

Answer

Both proximal and distal segments move simultaneously under load

Answer

Resistance is applied exclusively through resistance bands

Question 5

A 'valgus' force applied to the knee causes:

Accepted Answer

Laterally directed force that stresses the medial collateral ligament and medial structures

Answer

Compressive loading directed axially into the tibial plateau

Answer

Medially directed force that opens the medial joint space

Answer

Anterior tibial translation relative to the femur

Question 6

Which principle of body mechanics should be emphasized when teaching a patient a safe lifting technique?

Accepted Answer

Keep the load close to the body, hips and knees flexed, spine neutral

Answer

Lift with the spine in maximum flexion to protect the discs

Answer

Keep the load far from the body to increase the moment arm

Answer

Use rapid acceleration to reduce total time under load

Question 7

Scapulohumeral rhythm describes the coordinated ratio of glenohumeral to scapulothoracic movement during arm elevation. The generally accepted ratio is approximately:

Accepted Answer

2:1 (two degrees glenohumeral for every one degree scapulothoracic)

Answer

1:1 (equal glenohumeral and scapulothoracic contribution)

Answer

3:1 (three degrees glenohumeral for every one degree scapulothoracic)

Answer

4:1 (four degrees glenohumeral for every one degree scapulothoracic)