Shoulder Muscles and Functions Assessment

Shoulder Muscles and Functions Assessment

Assessment

Interactive Video

Physics

11th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial discusses the concept of kinetics and force couples, focusing on the rotation of the scapula and the muscles involved. It highlights the importance of muscle synergy in shoulder pathologies, particularly the interaction between the deltoid and rotator cuff during abduction. The tutorial also covers moment arm lengths and peak torque ratios, emphasizing the need for balanced muscle strength to prevent pathologies. The conclusion encourages reviewing anatomy and understanding muscle functions for both class and testing purposes.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a force couple in the context of scapular rotation?

Forces that cancel each other out

Different forces acting from the same point causing rotary motion

Two or more forces acting in the same direction

A single muscle causing rotation

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which muscles are involved in the upward rotation of the scapula?

Biceps and triceps

Deltoid and supraspinatus

Levator scapulae, rhomboids, pectoralis minor

Upper trapezius, serratus anterior, lower trapezius

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the rotator cuff contribute to shoulder abduction?

By elevating the humeral head

By depressing and rotating the humeral head

By stabilizing the scapula

By flexing the elbow

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What role does the supraspinatus play at the beginning of shoulder abduction?

It provides greater leverage than the deltoid

It stabilizes the scapula

It flexes the elbow

It extends the shoulder

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is the movement of the scapula important during shoulder elevation?

It reduces muscle fatigue

It maintains optimal length-tension relationships

It prevents the shoulder from dislocating

It increases the speed of movement

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the peak torque ratio between medial and lateral rotators?

5:4

1:1

3:2

2:1

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which muscle group is typically stronger, adductors or abductors?

Neither, they are weak

Both are equally strong

Abductors

Adductors

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