Dissection 5

Question 1

Biceps origin and insertion

Answer 1

Proximally: supraglenoid tubercle of scapula (long head), coracoid process (short head)

Distally: biceps tendon attaches to the radial tuberosity
Bicipital aponeurosis, blends with the deep fascia on the medial side of the proximal forearm

Question 2

Which 3 muscles attach to the coracoid process of the scapula?

Answer 2

Biceps brachii (short head)
Pectoralis minor
Corachobrachialis

Question 3

Nerve supply to the biceps (specific)

Answer 3

Musculocutaneous (C5 & C6)

Question 4

Corachobrachialis

Answer 4

Attaches from the coracoid process of the scapula to the humerus
Deep to the biceps and medial to the brachilias

Question 5

Brachialis

Answer 5

Attaches from the humerus to the coronoid process of the ulna (tuberosity of ulna)

Question 6

Most powerful supinator of the forearm

Answer 6

Biceps brachii

Question 7

Where does the musculocutaneous nerve pierce?

Answer 7

The corachobrachialis muscle

Question 8

How could you recognise the palmar cutaneous branch of the median nerve

Answer 8

It is in the superficial fascia of the distal half of the anterior forearm
It branches from the median nerve proximal to the flexor retinaculum
It passes into hand superficial to the flexor retinaculum and is therefore spared in carpal tunnel syndrome

Question 9

Where does the common flexor origin tendon thing attach and why is this important?

Answer 9

Medial epicondyle

Golfers elbow

Question 10

All of the muscles of the anterior compartment of the forearm are supplied by this nerve (name the muscle it doesn’t supply as well)

Answer 10

Median nerve
(except flexor carpi ulnaris and middle part of flexor digitorum profundus --> ulnar nerve)

Question 11

Actions of the anterior compartment of the forearm?

Answer 11

Flexion, abduction and adduction of the wrist
Flexion of fingers (digits 2-5)
Flexion of thumb
Pronation of the forearm

Question 12

Muscles in layer 1 of anterior compartment of forearm?

Answer 12

Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris

Question 13

Layer 2

Answer 13

Flexor digitorum superficialis

Question 14

Layer 3

Answer 14

Flexor digitorum profundus
Fllexor pollicis longus
Pronator quadratus

Question 15

Nerve supply of flexor digitorum profundus

Answer 15

Two ulnar head are supplied by ulnar nerve

Two radial heads are supplied by radial nerve

Question 16

Nerve supply of flexor pollicis longus

Answer 16

Median nerve

Question 17

Nerve supply of pronator quadratus

Answer 17

Ulnar nerve

PQU

Question 18

Borders of the cubital fossa

Answer 18

Superiorly: imaginary line between the epicondyles
Medial: pronator teres
Lateral: brachioradialis

Question 19

What can you palpate in the cubital fossa?

Answer 19

Distal tendon and aponeursosis of biceps brachii

Question 20

When does the radial nerve divide into its superficial and deep branches?

Answer 20

Deep to the radialis

Question 21

Ulnar nerve is made from which spinal roots?

Answer 21

C7, C8 and T1

Question 22

Where can the ulnar nerve be palpated?

Answer 22

Crosses the posterior surface of the medial epicondyle (“funny bone”)
-it then passes through flexor carpi ulnaris (in the cubital tunnel) to reach the anterior compartment of the forearm