Anatomy Dissection 8 Flashcards
What are the three muscles in the anterior compartment of arm supplied by?
Musculocutaneous nerve
What muscle in the arm comprises of a long and short head and two distal tendons: biceps tendon and bicipital aponeurosis?
Biceps brachii
What are the proximal attachments of the biceps brachii muscle?
- Supraglenoid tubercle of scapula via long head
2. Coracoid process of scapula via short head
Name three muscles which attach to the coracoid process of scapula?
- Pectoralis minor
- Coracobrachialis
- Short head of biceps
What tendon passes superiorly in the intertubercular groove of the humerus and then becomes enclosed within the fibrous layer of the shoulder joint capsule to reach the supraglenoid tubercle of the scapula?
Tendon of long head of biceps brachii
What can cause biceps tendinitis?
Movement of tendon of long head of biceps brachii within the intertubercular groove
What does the distal biceps tendon attach to?
Radial tuberosity
What distal tendon blends with the deep antebrachial fascia on the medial side of the proximal forearm?
Bicipital aponeurosis
What is peripheral nerve supply to biceps?
C5 + C6 musculocutanoeus
What muscle in anterior compartment of arm attaches from coracoid process of scapula to the humerus?
Coracobrachialis
What muscle is deep to biceps brachii and medial to brachialis, it is also seperated from the triceps by the medial intermuscular septae?
Coracobrachialis
What muscle of anterior compartment of arm attaches from humerus to coranoid process of ulna?
Brachialis
What is brachialis deep to and lateral to?
Deep to biceps brachii and lateral to coracobrachialis
What is brachialis seperated from the triceps by?
Lateral intermuscular septae
Muscles of the anterior compartmnet of forearm are supplied by median nerve except for what two parts?
Flexor carpi ulnaris Medial part (to digits 4/5) of flexor digitorum profundus - ulnar nerve
What compartment is involved in:
- flexion, abduction and adduction of wrist
- flexion of fingers (digits 2-5: index, middle, ring and little)
- flexion of thumb (digit 1-muscles named pollicis)
- pronation of the forearm at the proximal and distal radioulnar joints
Anterior compartment of forearm
What do layer 1 superficial muscles of anterior compartment of forearm attach by?
Proximally by common flexor tendon to medial epicondyle of humerus
What are the four layer 1 superficial muscles of anterior compartment of forearm?
- Pronator teres
- Palmaris longus: attaches distally to the palmar aponeurosis
- Flexor carpi radialis: attaches distally to the metacarpals on radial side
- Flexor carpi ulnaris: attaches distally to the metacarpals on ulnar side
What do layer 2 intermediate muscles attach to in anterior compartment of forearm?
Proximally to distal humerus, coronoid process of ulna and radial head
What muscles is in layer 2 intermediate of anterior compartment of forearm?
Flexor digitorum superficialis: four muscles bellies/tendons for medial four digits
What do layer 3 deep muscles of anterior compartment of forearm attach to?
Layer 2 muscles
Name the 3 layer 3 deep muscles of anterior compartment of forearm?
- Flexor digitorum profundus: four muscles bellies/tendons
- Flexor pollicis longus: attaches proximally to shaft of radius and ulna and interosseous membrane
- Pronator quadratus: attaches between distal anterior surfaces of radius and ulna
What can pain felt in the area of the medial epicondyle of humerus be a result of?
Tendonitis of common flexor tendon - Golfer’s elbow
What is the superior, medial and lateral border of cubital fossa?
Superior - transverse line between epicondyles of humerus
Medial - pronator teres
Lateral - brachioradialis
What is palpable in the cubital fossa?
Distal tendon (deep and lateral) and aponeurosis (medial) of biceps brachii
Name three superficial contents of cubital fossa?
Median cubital vein, cephalic vein and basilic vein
Name the three deep contents of cubital fossa?
Medial nerve (medially) Brachial artery Radial nerve (laterally)
What nerve crosses the posterior surface of the medial epicondyle of humerus where it can be palpated and readily injury (funny bone site)?
Ulnar nerve
What does the ulnar nerve pass through to reach the anterior compartment of forearm?
Flexor carpi ulnaris (in cubital tunnel)