Dissection 5 Flashcards
Biceps origin and insertion
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
Which 3 muscles attach to the coracoid process of the scapula?
Biceps brachii (short head)
Pectoralis minor
Corachobrachialis
Nerve supply to the biceps (specific)
Musculocutaneous (C5 & C6)
Corachobrachialis
Attaches from the coracoid process of the scapula to the humerus
Deep to the biceps and medial to the brachilias
Brachialis
Attaches from the humerus to the coronoid process of the ulna (tuberosity of ulna)
Most powerful supinator of the forearm
Biceps brachii
Where does the musculocutaneous nerve pierce?
The corachobrachialis muscle
How could you recognise the palmar cutaneous branch of the median nerve
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
Where does the common flexor origin tendon thing attach and why is this important?
Medial epicondyle
Golfers elbow
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)
Median nerve (except flexor carpi ulnaris and middle part of flexor digitorum profundus --> ulnar nerve)
Actions of the anterior compartment of the forearm?
Flexion, abduction and adduction of the wrist
Flexion of fingers (digits 2-5)
Flexion of thumb
Pronation of the forearm
Muscles in layer 1 of anterior compartment of forearm?
Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
Layer 2
Flexor digitorum superficialis
Layer 3
Flexor digitorum profundus
Fllexor pollicis longus
Pronator quadratus
Nerve supply of flexor digitorum profundus
Two ulnar head are supplied by ulnar nerve
Two radial heads are supplied by radial nerve
Nerve supply of flexor pollicis longus
Median nerve
Nerve supply of pronator quadratus
Ulnar nerve
PQU
Borders of the cubital fossa
Superiorly: imaginary line between the epicondyles
Medial: pronator teres
Lateral: brachioradialis
What can you palpate in the cubital fossa?
Distal tendon and aponeursosis of biceps brachii
When does the radial nerve divide into its superficial and deep branches?
Deep to the radialis
Ulnar nerve is made from which spinal roots?
C7, C8 and T1
Where can the ulnar nerve be palpated?
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
