Shoulder Joint, Posterior Arm & Posterior Forearm Flashcards Preview

MSK Anatomy > Shoulder Joint, Posterior Arm & Posterior Forearm > Flashcards

Flashcards in Shoulder Joint, Posterior Arm & Posterior Forearm Deck (16)
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1
Q

What nerve supplies the deltoid muscle?

A

Axillary

2
Q

What are the attachments of the deltoid?

A
Proximally = Lateral 1/3 of the clavicle and inferior aspects of spine and acromion 
Distally = Deltoid tuberosity of humerus
3
Q

What strengthens the fibrous capsule of the shoulder joint?

A
Superiorly = Supraspinatus tendon
Posteriorly = Infraspinatus and teres minor tendons
4
Q

Where is the subacromial bursa located?

A

Between supraspinatus tendon and accordion process of scapula

5
Q

What is the sensory innervation to the posterior arm?

A
Medially = Anterior rami of C8, T1 and T2
Laterally = Anterior rami of C5 and C6
6
Q

What is the only muscle of the posterior compartment of the arm?

A

Triceps Brachii

7
Q

What is the innervation of triceps brachii?

A

Radial nerve

8
Q

What are the attachments of triceps brachii?

A
Proximal = Infragelnoid tubercle of scapula (long head), superior (lateral head) and inferior (medial head) to the radial groove of the humerus 
Distal = Triceps tendon attached to olecranon process of ulna
9
Q

What is the action of triceps brachii?

A

Weak extension of the arm at the shoulder

Extension of the forearm at the elbow

10
Q

What muscles are supplied by the axillary nerve?

A

Deltoid

Teres minor

11
Q

Which spinal nerves form the axillary nerve?

A

C5-6

12
Q

Where is the axillary nerve found?

A
Quadrangular space 
Teres minor superiorly 
Theres major inferiorly 
Long head of triceps medially 
humerus laterally
13
Q

What is the area of skin innervated by the axillary nerve called?

A

Badge patch

14
Q

Which spinal nerves form the radial nerve?

A

C5-T1

15
Q

With which kind of fracture is the radial nerve at particular risk?

A

(Spiral) mid shaft fracture of the humerus

16
Q

What is the nerve supply to the posterior compartment of the forearm?

A

Radial nerve