2026 anatomy topic 18 brach and cubital fossae

brachium and cubital fossa

how many compartments does the brachium have?

2, anterior and posterior

the head of the radius is proximal or distal?

proximal

the head of the ulna is proximal or distal?

distal

what are the 5 brachium mms?

biceps brachii

brachialis

coracobrachialis

triceps brachii

anconeus

what is the main arterial supply to the arm?

the brachial artery

the brachial artery is a continuation of what artery?

axillary artery

what is the main branch of the brachial artery?

the deep brachial artery

where does the deep brachial artery travel?

with radial nerve posteriorly around humeral shaft

the deep brachial artery divides into what 2 arteries?

middle collateral and radial collateral which makes the anastomosis of the elbow

the brachial artery ends at which boney landmark?

the cubital fossa under the bicipital aponeurosis

after the cubital fossa, the brachial artery changes its name to what artery?

divides into the radial and ulnar arteries

what are the terminal branches of the brachial plexus?

musculocutaneous, median, ulnar, radial, and axillary

which nerves pierces the coracobrachialis?

musculocutaneous

the radial nerve supplies mm in which compartment of the arm?

posterior compartment

what are the 3 cutaneous branches that come from the radial nerve

posterior brachial cutaneous, posterior antebrachial cutaneous, and lower lateral brachial cutaneous

the radial nerve passes around the humeral head in what groove?

the radial groove

once the radial nerve goes through the radial groove, it is headed where?

the anterior compartment of the antebrachium and divides into 2 branches - deep radial (>posterior interosseous), and superficial radial n

once the radial nerve gets into the anterior antebrachium, it splits into which nerves?

deep radial and superficial radial n

does the median nerve supply anything in the brachium?

no

the median nerve runs where?

distally on the lateral side of brachium until the middle of the brachium and crosses medially

after the radial nerve crosses medially at the middle of the brachium, it goes where?

descends into the cubital fossa deep to bicipital aponeurosis, has some articular branches at the elbow jt and supplies mm in 4arm and hand with cut sen to part of hand

where does the ulnar nerve travel after the brachium?

medial side of brachial artery, passes posterior to medial epicondyle into cubital tunnel (funny bone) medial to olecranon, articular branches in elbow jt and heads to mm in 4 arm and hand and cut sensation to part of hand

does the ulnar nerve supply anything in the brachium?

no

what are the boundaries of the cubital fossa?

pronator teres mm, brachioradialis mm, and line connecting the medial and lateral epicondyles of the humerus

what are the contents of the cubital fossa?

brachial artery as it divides into the radial and ulnar arteries

biceps brachii tendon

median nerve

radial nerve as it divides into deep and superficial branches

medial cubital vein (for venipuncture)