Anterior Forearm and Wrist

Question 1

Palmaris Longus

• Attachments
• Function
• Innervation

Answer 1

• Medial epicondyle to palmar fascia
• Tightens aponeurosis and aids with wrist flexion
• Median nerve (C7+C8)

Question 2

Pronator Teres

• Attachments
• Pronation
• Median nerve (C6+C7)

Answer 2

• Medial epicondyle of humerus and coronoid process of ulna to the lateral surface of the radius. Passes over anterior surface of elbow.
• Pronation (assists elbow flexion)
• Median nerve (C6+C7)

Question 3

Flexor Carpi Ulnaris and Radialis

• Ulnaris attachments
• Radialis attachments
• Functions
• Innervations

Answer 3

• From medial epicondyle to the base of pisiform, hamate and 5th metacarpal
• From medial epicondyle to the base of the 2nd metacarpal
• Ulnaris adducts wrist, radialis abducts wrist
• Ulnaris: ulnar nerve (C7+C8), Radialis: median nerve (C6+C7)

Question 4

Flexor Digitorum Superficialis

• Attachments
• Function
• Innervation

Answer 4

• Medial epicondyle of the humerus and coronoid process of ulna, to the middle phalanges of digits 2-5 (all bar thumb)
• Flexes metacarpopharyngeal (MCP) and proximal interphalangeal (PIP) joint, and flexes wrist.
• Median nerve (C7,C8+T1)

Question 5

Flexor Digitorum Profundus

• Attachments
• Function
• Innervation (ring and little fingers)
• Innervation (index and middle fingers)

Answer 5

• Ulna and interosseous membrane to distal phalanges of digits 2-5 (palmar)
• Flexion of MCP, PIP and distal interphalangeal join (DIP) of digits 2-5. Also flexes wrist.
• Ulnar nerve (C8+T1)
• Median nerve (C8+T1 anterior interosseous)

Question 6

Flexor Pollicis Longus

• Attachments
• Function
• Innervation
• Brevis

Answer 6

• Radius and interosseous membrane to the base of the distal phalanx of the thumb
• Flexion of MCP and IP of thumb and wrist. Only flexes thumb
• Median nerve (C8+T1 anterior interosseous)
• At base of thumb

Question 7

Pronator Quadratus

• Attachments
• Function
• Innervation

Answer 7

• Distal anterior ulna to distal anterior radius
• Pronation and help to stabilise distal radioulnar joint
• Median nerve (C8+T1 anterior interosseous)

Question 8

Median Nerve

• Combination of…
• What is it?
• What type of fibres

Answer 8

• Medial and lateral cords. C6-T1 fibres.
• Major nerve of anterior compartment of forearm. Travels through the carpal tunnel.
• Motor and sensory fibres

Question 9

Ulnar Nerve and Artery

• Nerve origin
• Artery origin
• Side
• Radial nerve supplies

Answer 9

• C7-T1 fibres from medial cord.
• Branch of the brachial artery
• On the little finger side
• Posterior compartment

Question 10

Wrist Bones

• Carpal bones

Answer 10

• Hamate, capitate, trapezoid, trapezium, triquetral (pisiform), lunate and scaphoid

Question 11

​Carpal Tunnel

• Ulnar artery and nerve
• Other structures passing into the hand

Answer 11

• Go above the carpal tunnel
• Go through the carpal tunnel