Ulnar Nerve Flashcards
What are the spinal roots of the ulnar nerve
C8-T1
What are the motor functions of the ulnar nerve
Muscles of hand (apart from
thenear muscles and lateral
two lumbricals)
Flexor carpi ulnaris
Medial half of flexor digitorum profundus
(Muscles in anterior compartment of forearm)
What are the sensory functions of ulnar nerve
Anterior and posterior surfaces of medial one and a half fingers and associated palm area
What is the ulnar nerve a continuation of
Medial cord of brachial plexus
What is the anatomical course of the ulnar nerve
Descends down medial side of upper arm
Passes posterior to medial epicondyle
Pierces two heads of flexor carpi ulnaris and travels alongside ulna
Gives rise to three branches in forearm
Travels superficial to flexor retinaculum
Enters hand via Guyon’s canal
Terminates in hand
What are the three branches that arise from the ulnar nerve in the forearm
Muscular branch
Palmar cutaneous branch
Dorsal cutaneous branch
What is the function of the muscular branch of the ulnar nerve
Innervates muscles in anterior forerarm
What ist he function of palmar cutaneous branch of ulnar nerve
Innervates skin of medial half of palm
What is the function of the dorsal cutaenous branch of the ulnar nerve
Innervates skin of medial one and a half fingers and associated palm area
What are the terminal branches of the ulnar nerve
Superficial branch
Deep branch
What is the function of flexor carpi ulnaris
Flexes and adducts hand at wrist
What is the function of flexor digitorum profundus
Flexes fingers
What muscles of the hand are innervated by the deep branch of the ulnar nerve
Hypothenar muscles Medial two lumbricals Adductor pollicis Interossei of hand Palmaris brevis
What branches of the ulnar nerve are responsible for cutaneous innervation
Palmar cutaneous branch
Dorsal cutaneous branch
Superficial branch
Which cutaneous branches of the ulnar nerve arise in the forearm
Palmar cutaneous branch
Dorsal cutaneous branch
