Motor and sensory innervation of the upper limb

What are the 5 nerves suppling motor innervation to the upper limb?

- Axillary - Musculocutaneous - Radial - Median - Ulnar

Which muscles of the anterior forerarm are not innervated by the radial nerve?

- Flexor carpi ulnaris - Medial half of flexor digitorum profundus

What makes up the borders of the triangular interval?

- Inferior border of teres minor - Long head of triceps - Shaft of humerus

What muscles does the ulnar nerve supply?

- Medial half of flexor digitorum profundus - Flexor carpi ulnaris - Intrinisc hand muscles (not thenar/lumbricals)

What muscles does the musculocutaneous nerve supply?

Anterior compartment of the arm - Coracobrachialis - Biceps brachii - Brachialis

What muscles does the median nerve innervate?

Anterior forearm - Superficial: pronator teres, flexor carpi radialis, palmaris longus - Intermediate: Flexor digitorum superficilais - Deep (ant. interosseous): Flexor pollicus longus, pronator quadratus, lateral half of flexor digitorum profundus Hand - Thenar muscles (recurrent branch) - Lateral lumbricals (palmar digital branch)

What part of the arm does the musculocutaneous nerve receive sensory information from?

Anterolateral forearm

What does the median nerve travel alongside?

Brachial artery

What part of the arm does the median nerve receive sensory information from?

Central palm of hand, lateral 3.5 fingers

Through what does the musculocutaneous nerve pass through to enter the anterior comapartment of the arm?

Coracobrachialis

What structures does the median nerve travel between as it passes through the antecubital fossa?

Flexor digitorum profundis and flexor digitorum superficialis

What important structure at the wrist is the median nerve deep to?

Flexor retinaculum

What are the sensory portions of the radial nerve known as ?

Inferior lateral cutaneous nerve of arm, Posterior cutaneous nerve of arm and forearm, Superficial branch of radial nerve

What is the sensory portion of the musculocutaneous nerve known as ?

Lateral antebrachial cutaneous nerve of forearm

What part of the arm does the ulnar nerve receive sensory information from?

Medial 1 ½ digits on palmar and dorsal surfaces

What do the medial cutaneous nerve of arm and forearm branch off of?

Medial cord of brachial plexus

What structure of the elbow does the ulnar nerve travel deep to?

Medial epicondyle

What are the sensory portions of the median nerve known as ?

Palmar digital branches of median nerve

What muscles does the radial nerve innervate?

Posterior compartment of arm - Triceps brachii Posterior compartment of forearm - Brachioradialis - Extensor carpi radialis longus

What does the deep branch of the radial nerve become as it passes through the supinator muscle?

Posterior interosseus nerve

What part of the arm does the axillary nerve receive sensory information from?

Proximal lateral arm

What does the radial nerve travel down the arm in?

Radial groove of humerus

Which nerve emerges from the triangular interval?

Radial nerve

What makes up the borders of the quadrangular space through whivh the axillary nerve emerges?

Subscapularis, teres major, long head of triceps, shaft of humerus

What is the sensory portion of the ulnar nerve known as ?

Superficial branch of ulnar nerve

What is the sensory portion of the axillary nerve known as ?

Superior lateral cutaneous nerve of arm

What structure does the axillary nerve wrap around?

Surgical neck of the humerus

Which muscles does the axillary nerve supply?

deltoid and teres minor

What part of the arm does the radial nerve receive sensory information from?

lateral distal arm, posterior arm and forearm, dorsum of hand (lateral 3 ½ digits), thenar eminence.

Which nerves receive sensory information of the upper limb?

•Axillary nerve •Musculocutaneous nerve •Radial nerve •Median nerve •Ulnar nerve •Medial cutaneous nerve of the arm •Medial cutaneous nerve of the forearm