Shoulder Joint

Which type of joint is the glenohumeral joint (shoudler joint)?

Ball and socket

Which of the following muscles comprise the rotator cuff?

teres minor, subscapularis, infraspinatus, supraspinatus

What are the landmarks of the humerus? *refer to slides*

- greater tuberosity - Lesser tuberosity - Intertubercular groove - deltoid tuberosity

What are the anterior humeral muscles?

1. Anterior deltoid 2. Pectoralis major 3. Coracobrachialis 4. Biceps brachii

What are the three sets of movements of the shoulder joint?

1. Flexion/extension/hyperextension 2. Abduction/adduction 3. internal/external rotation

What are the posterior humeral muscles?

1. Posterior deltoid 2. Latissimus dorsi 3. Teres major 4. Triceps brachii

What are the adductor humeral muscles?

1. Subscapularis 2. Pectoralis major 3. Latissimus dorsi 4. Teres major

What are the abductor humeral muscles?

1. Supraspinatus 2. Middle deltoid

How many degrees of freedom does the shoulder joint have?

3 DoF

Which of the following muscles will flex the shoulder joint?

Anterior deltoid

Push-up: During the positive (up) phase of the push-up, the pectoralis major is producing a __________ contraction.

Concentric

Which of the following is NOT an adductor of the shoulder joint?

Deltoid

Shoulder adduction occurs in the _________ plane

Frontal

Which muscle acts to abduct the shoulder?

Middle deltoid

Which of the following muscles will extend the shoulder joint?

Posterior deltoid

What is the positive phase of a push up?

Raising the body from the floor

Which two bones make up the shoulder joint?

Scapula and humerus

What do posterior humeral muscles do?

Shoulder extension

What do anterior humeral muscles do?

Shoulder flexion

What muscles are activated during the positive phase of a push up?

Shoulder flexors: anterior deltoid, pectoralis major and coracobrachialis.

What muscles are activated during the negative phase of a push up?

Shoulder flexors:anterior deltoid, pectoralis major and coracobrachialis.

What is the function of rotator cuff muscles?

Small muscles that maintain the humeral head in a proper position

Which rotator cuff muscle is responsible for internal rotation of the shoulder?

Subscapularis

Which anatomical term describes the supraspinatus in reference to the spine of the scapula?

Superior

What happens during a rotator cuff tear?

The rotator cuff tendon is torn and no longer attaches to the head of the humerus

Which of the following will NOT abduct the shoulder joint?

Triceps

Which of the following muscles does not concentrically act to perform shoulder flexion?

Triceps brachii long head

Shoulder joint=

glenohumeral joint

Flexion/extension of the shoulder joint occurs in the ____________ plane, while abduction/adduction of the shoulder joint occurs in the ____________ plane.

sagittal; frontal

Which of the following muscle is the most commonly torn of the rotator cuff?

supraspinatus

What are the rotator cuff muscles?

supraspinatus, infraspinatus, teres minor, subscapularis