Chapter 37: Upper Limb Overview
What is the English equivalent for "cubitus"?
elbow
The brachial plexus is formed directly from the ventral rami of which spinal nerves?
C5, C6, C7, C8, and T1
Digit 1 corresponds to which finger?
thumb (pollex)
Name the 4 rotator cuff muscles.
1. Supraspinatus m.
2. Infraspinatus m.
3. Teres minor m.
4. Subscapularis m.
The posterior interosseous nerve (PIN) innervates how many muscles in the forearm?
8
What is the Latin equivalent for "fingers"?
digiti manus
Trunks and cords are found in what region of the body, respectively?
Neck; axilla
From lateral to medial, the distal row of carpal bones consists of which 4 bones?
1. Trapezium
2. Trapezoid
3. Capitate
4. Hamate
Name all heads of the triceps brachii m. + biceps brachii m.
Triceps brachii m.: long head + lateral head + medial head.
Biceps brachii m.: long head + short head.
At what region does the subclavian artery terminate and become the axillary artery?
The lateral border of the 1st rib
What is the name of the region where the cephalic vein courses between the deltoid and pectoralis major muscles?
deltopectoral groove
Name the 2 branches originating from the upper trunk.
1. Nerve to the subclavius
2. Suprascapular nerve
Name the 3 inward extensions of the brachial fascia.
1. Lateral intermuscular septum
2. Medial intermuscular septum, anterior lamina
3. Medial intermuscular septum, posterior lamina
Name the action + innervation of palmaris longus m.
Flex hand at wrist; median n.
Outside the carpal canal, the ulnar artery passes through what structure anterior to the flexor retinaculum?
Guyon's canal
The axillary vein forms at the junction of what other veins?
The medial antebrachial cutaneous nerve supplies what portion of the body?
The skin on the medial forearm
The floor of the cubital fossa is made up of what 2 muscles?
1. Supinator muscle
2. Brachialis muscle
Name the action + innervation of the extensor carpi ulnaris m.
Extend + adduct hand at wrist; PIN (posterior interosseous n.)
The musculocutaneous nerve descends through which compartment of the arm + courses between which 2 muscles?
Anterior compartment of the arm; between biceps brachii + brachialis muscles.
What 5 bones make up the shoulder girdle?
1. Manubrium of sternum
2. Right + left scapulae
3. Right + left clavicles
The axillary nerve courses through what space? What muscles does it innervate?
Courses through the quadrangular space of the shoulder; innervates teres minor + deltoid muscles.
The ulnar bursa (within the carpal canal) surrounds which tendon(s)?
8 tendons: 4 tendons of flexor digitorum superficialis + 4 tendons of flexor digitorum profundus.
How many muscles does the radial nerve innervate? Name them.
4 of them:
1. Triceps brachii m.
2. Brachioradialis m.
3. Extensor carpi radialis longus m.
4. Anconeous m.
The superficial branch of the radial nerve provides cutaneous innervation to the skin of what regions of the hand?
Lateral half of the dorsum of the hand + proximal portion of the lateral 3.5 digits (posteriorly)