Occupational Therapist Test Biomechanics and Kinesiology 3

Question 1

Arthrokinematics refers to:

Accepted Answer

Accessory motions occurring at joint surfaces during osteokinematic movement

Answer

Arthrokinematics describes the roll, slide, and spin movements that occur between joint surfaces as a bone moves through its range of motion.

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

A force couple consists of two equal, parallel, opposite forces separated by a distance, producing pure rotation without linear translation, as seen in scapular upward rotation.

Question 3

The 'lumbrical grip' is characterized by:

Accepted Answer

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

Answer

The lumbrical grip involves MCP flexion with IP extension (intrinsic-plus position), ideal for holding flat objects such as a book or tablet.

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

Open kinetic chain exercises have the distal segment free to move, such as a straight-leg raise or seated knee extension, producing isolated muscle activation.

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

Valgus force drives the distal segment laterally (knocking the knee inward), creating tensile stress on the medial collateral ligament and compressive stress on the lateral compartment.

Occupational Therapist Test Practice Test

Occupational Therapist Test Practice Test

Occupational Therapist Test Biomechanics and Kinesiology 3