Hand

scaphoid

lunate

hammate

pisiform

triquetrum

trapezoid

capitate

trapezium

hypothenar compartment

base of the little finer and contains 4 muscles

thenar compartment

base of the thumb and contains 3 muscles

dorsal carpal arch

system of small arteries given off by the radial artery

gives off dorsal metacarpal arteries and dorsal digital arteries

dorsal interossei muscles

lie between metacarpals and are numbered beginning with 1 which lied between the metacarpals of the thumb and index finger

dorsal interossei muscles origin

adjacent sides of metacarpals

dorsal interossei insertion

radial side of index finger, radial side of middle finger, ulnar side of middle finger, ulnar side of 4th finger

dorsal interossei nerve

ulnar

dorsal interossei function

abduct the middle three fingers

middle finger can abduct laterally or medially

palmar aponeurosis

palmaris brevis muscle origin

palmar aponeurosis

palmaris brevis insertion

connective tissue of skin on ulnar side of palm

palmaris brevis nerve

ulnar

palmaris brevis function

transverse connections from palmar aponeurosis

superficial palmar arch

continuation of the ulnar artery

median nerve of hand

enters through carpal tunnel and recurrent branch innervates the thenar compartment muscles

ulnar nerve of hand

superficial: sensory of medial palm and half 4th and 5th digit surface

deep: innervates hypothenar muscles

deep palmar arch

continuation of the radial artery

lumbricals origin

lateral: one head of origin

medial: bipennate

lumbricals insertion

lateral side of extensor expansion hood of digits 2-5

lumbricals nerve

lateral 2: median

medial 2: ulnar

lumbricals function

flex metacarpal-phalangeal joints and extend the interphalangeal joints of fingers

adductor policis origin

obliquqe head: carpal bones and bases of 2nd and 3rd metacarpals

transverse head: body of 3rd metacarpal

adductor policis insertion

medial side of proximal phalanx of thumb

adductor pollicis nerve

deep ulnar

adductor policis function

adducts thumb

palmar interossei origin

Medial side of second metacarpal; lateral sides of fourth and fifth metacarpals

palmar interossei insertion

extensor expansion

palmar interossei nerve

ulnar

palmar interossei function

adduction of the digits

thenar muscle group

flexor pollicis brevis, abductor pollicis brevis, opponens pollicis

flexor pollicis brevis origin

flexor retinaculum and carpal bones

flexor pollicis brevis insertion

base of proximal phalanx of thumb

flexor pollicis brevis nerve

median

flexor pollicis brevis function

flexes thumb

abductor pollicis brevis origin

carpal bones

abductor pollicis brevis insertion

base of proximal phalanx on lateral side

abductor pollicis brevis nerve

median

abductor pollicis brevis function

abducts thumb

opponens pollicis origin

carpal bones and flexor retinaculum

opponens pollicis insertion

lateral side of 1st metacarpal

opponens pollicis nerve

median

opponens pollicis function

opposes thumb to another finger

hypothenar muscle group

abductor digiti minimi, flexor digiti minimi, opponens digiti minimi

abductor digiti minimi origin

carpal bones

abductor digiti minimi insertion

medial side of base of proximal phalanx

abductor digiti minimi nerve

ulnar

abductor digiti minimi function

abducts 5th digit

flexor digiti minimi origin

carpal bones

flexor digiti minimi insertion

palmar side of proximal phalanx

flexor digiti minimi nerve

ulnar

flexor digiti minimi function

flexes proximal phalanx of 5th digit

opponens digiti minimi origin

carpal bones

opponens digiti minimi insertion

body of 5th metacarpals

opponens digiti minimi nerve

ulnar

opponens digiti minimi function

draws little finger into opposition with thumb

ulnar nerve palsy or damage

impaired abduction and adduction of the medial 4 fingers

median nerve palsy

common cause is capral tunnel syndrome

pain and tingling or numbness/anesthesia in the cutaneous portion

ape hand

long standing median nerve injury

flattening of the thenar eminence