Exam IV Upper Limb Flashcards
What makes up the rotator cuff?
- supraspinatus
- infraspinatus
- subscapularis
- teres minor
What rotator cuff muscle(s) attach to the greater tubercle of the humerus?
on posterior side,
- supraspinatus
- infraspinatus
- teres minor
What rotator cuff muscle(s) attach to the lesser tubercle of the humerus?
subscapularis
What part of the rotator cuff is usually injured and responsible for impingement of the shoulder?
supraspinatus tendon
What structures can be injured from shoulder dislocation?
- axillary nerve
- radial nerve
- deep brachial artery
- brachial artery
The brachial plexus is formed by anterior rami coming off which spinal nerves?
- C5-C8
- T1
Name the SENSORY innervations of the brachial plexus.
- C6: pad of thumb
- C7: pad of index finger
- C8: pad of little finger
Name the MOTOR innervations and functions of the brachial plexus.
C5- abduction of arm at glenohumeral joint
C6: flexion of forearm at elbow
C7: extension of forearm at elbow
C8: flexion of fingers
What are the motor and sensory functions of the musculocutaneous nerve?
- provides motor innervation to anterior ARM
- receives sensory input from lateral FOREARM
Name the nerve that primarily innervates the anterior component of the FOREARM.
median nerve, except for
- flexor carpi ulnaris
- medial flexor digitorium profundus (fingers 4 & 5)
Name the nerve that primarily innervates the intrinsic muscles of the hand.
ulnar nerve
Name the nerve that primarily innervates the posterior components of the arm and forearm.
- radial nerve
- however triceps probably innervated by axillary nerve
Which spinal nerve gives rise to the phrenic nerve?
C4-C5** check
What muscles make up anterior wall of axilla?
- pectoralis major
- pectoralis minor
- subclavius
What muscle makes up medial wall of axilla, and what innervates it?
-serratus anterior, innervated by long thoracic nerve
What causes “winging” of the scapula?
damage to the long thoracic nerve
What nerve provides cutaneous sensation to the lateral shoulder?
axillary nerve
What muscles attach to intertubercular sulcus of the humerus (lateral wall of axilla)?
- pectoralis major
- teres major
- latissimus dorsi
What separates the quadrangular space from the triangular space?
long head of triceps brachii
What forms posterior wall of axilla?
- subscapularis
- proximal long head of triceps brachii
- distal latissimus dorsi
- distal teres major
- scapula
The axillary artery becomes what artery at teres major? What other arteries arise from axial artery?
- brachial artery
- subscapular artery
The subclavian vein gives rise to the ___ vein posteriorly/superficially and the axillary vein anteriorly. The axillary vein becomes the ____ vein at teres major.
cephalic vein; basilic vein
Which of the ventral roots of the brachial plexus does not converge?
C7
What roots of brachial plexus make up superior, middle, and inferior trunks?
superior: C5-C6
middle: C7
inferior: C8-T1