Organization of the

Upper Limb

Robert S. Staron, Ph.D.

August Immersion

Grant’s Atlas of Anatomy 8th ed Grant’s Atlas 8th ed

Antr division:

flexor comp.

Postr division:

ext comp.

Netter’s Atlas of Human Embry 2002

Origin of Limb

Muscles

Dorsal muscle mass forms

extensors and supinators in

upper limb, extensors and

abductors in lower limb.

Ventral muscle mass forms

flexors and pronators in

upper limb and flexors and

adductors in lower limb.

Morphogenesis guided by CT,

not myoblasts

Split into individual muscles,

cell death involved

Carlson l999 Human Embryology Larsen 1993

Hollinshead’s Textbook of Anatomy 5th ed

Grant’s Dissector 13th ed

Brachial Plexus

Netter’s Atlas 2nd ed

1) trapezius m.

2) latissimus dorsi m.

3) levator scapulae m.

4) rhomboideus major m.

5) rhomboideus minor m.

6) serratus anterior m.

1) infraspinatus m.

2) supraspinatus m.

3) subscapularis m.

4) teres minor m.

5) teres major m.

6) deltoid m.

Extrinsic shoulder mm. Intrinsic shoulder mm.

Anterior thorax mm.

1) pectoralis major and minor mm.

2) subclavius m.

Netter’s Atlas of Human Anatomy 2nd ed

rotator cuff musculature

Netter’s Atlas 2nd ed

Netter’s Atlas 2nd ed

Grant’s Dissector 13th ed

brachium

biceps brachii m.

long head

short head

brachialis m.

coracobrachialis m.

triceps brachii m.

lateral head

medial head

long head

anconeus m.

antr compartment postr compartment

musculocutaneous n.

(C5-C7)

Netter’s Atlas of Human Anatomy 2nd ed

biceps brachii m.

brachialis m.

coracobrachialis m.

axillary n. (C5-C6)

radial n. (C5-T1)

Netter’s Atlas of Human Anatomy 2nd ed

deltoid m. teres minor m.

triceps brachii m. anconeus m.

(brachialis m.)

Grant’s Dissector 13th ed

Grant’s Dissector 13th ed

antebrachium

pronator teres m.

flex. carpi radialis m.

palmaris longus m.

flex. carpi ulnaris m.

flex. digit. superf. m.

flex. digit. profund. m.

flex. pollicis longus m.

pronator quadratus m.

brachioradialis m.

ext. carpi radialis longus m.

ext. carpi radialis brevis m.

ext. carpi ulnaris m.

extensor digitorum m.

extensor digiti minimi m.

extensor indicis m.

abd pollicis longus m.

ext. pollicis longus/brevis m.

supinator m.

antr compartment postr compartment

radial n. (C5-T1)

Netter’s Atlas of Human Anatomy 2nd ed

triceps brachii m.,

anconeus m.

(brachialis m.)

BR, ECRL, ECRB,

ED, EDM,

supinator, ECU,

EI, AbdPL, EPL,

EPB

ulnar n. (C7-T1)

Netter’s Atlas of Human Anatomy 2nd ed

flex carpi ulnaris m.

medial ½ FDP

+ 14 intrinsic hand muscles

median n. (C5-T1)

Netter’s Atlas of Human Anatomy 2nd ed

PT, FCR, PL,

FDS, lat ½ FDP,

FPL, PQ

+ 5 intrinsic hand muscles

Grant’s Atlas of Anatomy 11th ed

intrinsic hand muscles

7 interosseii mm. (4 dorsal/3 palmar)

4 lumbrical mm. (1, 2, 3, 4)

palmaris brevis m.

adductor pollicis m.

three thenar mm. (OP, abd.PB, FPB)

three hypothenar mm. (ODM, abd.DM, FDMB)

intrinsic hand muscles

7 interosseii mm. (4 dorsal/3 palmar)

4 lumbrical mm. (1, 2, 3, 4)

palmaris brevis m.

adductor pollicis m.

three thenar mm. (OP, abd.PB, FPB)

three hypothenar mm. (ODM, abd.DM, FDMB)

(median n.) (ulnar n.)

upper limb -

cutaneous innervation

Netter’s Atlas of Human Anatomy 2nd ed

upper limb –

dermatome pattern

Netter’s Atlas of Human Anatomy 2nd ed