A&P 6- wrist and hand

what are some common causes of carpal tunnel?

Fluid retention Infection Excessive exercise of the fingers

what forms the anatomical snuff box

The anatomical snuff box is formed by tendons of the abductor pollicis longus, extensor pollicis brevis, and extensor pollicis longus

what specific portion of the median nerve is affected by carpal tunnel?

The thenar branch of the median nerve

which digits experience hypoesthesia in carpal tunnel?

lateral 3 and 1/2 digits

what digits of the hand are supplied by the terminal sensory branches of the median nerve?

lateral three and one-half digits (thumb and fingers in the middle).

what nerve is involved in carpal tunnel?

median nerve

what are the motor manifestations of carpal tunnel?

progressive loss of coordination and strength unable to oppose the thumb

what is the thenar eminence ?

the bulge created on teh lateral surface of the palm formed by muscles of the thenar compartment

what arteries supply blood to the hand?

ulnar and radial artery

what nerve running through the wrist is not involved with the carpal tunnel syndrome?

ulnar nerve

what is carpal tunnel syndrome?

Carpal tunnel syndrome results from any lesion that significantly reduces the size of the carpal tunnel

what is the insertion, action, innervation and arterial supply of adductor pollicis?

Insertion: medial side of proximal phalanx of thumb Action: draws 1st metacarpal medially toward center of palm (adducts thumb) Innervation: ulnar nerve Arterial Supply: radial artery

what is the origin, insertion, action and innervation of the lumbricals?

Origin: distal portion of flexor digitorum profundus tendons Insertion: distal portion of extensor digitorum tendons Action: flexes and extends fingers Innervation: median and ulnar nerves

what is the origin, insertin, action, innervation and arterial supply of the opponens digiti minimi?

Origin: flexor retinaculum and hamate Insertion: medial 5th metacarpal Action: draws 5th metacarpal anteriorly, bringing little finger (5th digit) into opposition with thumb Innervation: ulnar nerve Arterial Supply: ulnar artery

what is the origin, insertin, action, innervation and arterial supply of the flexor digiti minimi brevis?

Origin: flexor retinaculum and hamate Insertion: medial side of proximal phalanx of little finger Action: flexes little (5th) finger Innervation: ulnar nerve Arterial Supply: ulnar artery

what is the origin, insertion, action, innervation and arterial supply of opponens pollicis?

Origin: flexor retinaculum, scaphoid, and trapezium Insertion: lateral 1st metacarpal Action: draws 1st metacarpal medially to oppose little finger toward center of palm Innervation: median nerve Arterial Supply: radial artery

what is the origin, insertion, action, innervation and arterial supply of abductor pollicis brevis?

Origin: flexor retinaculum, scaphoid, and trapezium Insertion: lateral side of proximal phalanx of thumb Action: abducts thumb <<and helps oppose it>> Innervation: median nerve Arterial Supply: radial artery

what is the origin, insertion, action, innervation and arterial supply of flexor pollicis brevis?

Origin: flexor retinaculum, scaphoid, and trapezium Insertion: lateral side of proximal phalanx of thumb Action: flexes thumb Innervation: median and ulnar nerves Arterial Supply: radial artery

what is the origin, insertin, action, innervation and arterial supply of the abductor digiti minimi?

Origin: pisiform Insertion: medial side of proximal phalanx of little finger Action: Abducts Innervation: ulnar nerve Arterial Supply: ulnar artery

what are the muscles of the hypothenar compartment?

abductor digiti minimi flexor digiti minimi brevis opponents digiti minimi

what are the muscles of the thenar compartment?

abductor pollicis brevis opponens pollicis

what is the action and innervation of the palmar interossei?

action:adducts and flexes fingers innervation: ulnar nerve

what structure forms the posterior wall of the carpal tunnel?

extensor retinaculum

what is the tendon found in the y-shaped split of the flexor retinaculum?

flexor carpi radialis

what structures are within the carpal tunnel?

flexor digitorum produndus flexor digitorum superficialis median nerve flexor pollicus longus synovial sheath

what structure forms the anterior wall of the carpal tunnel?

flexor retinaculum

what is the origin, action and innervation of dorsal interossei?

origin: metacarpals action: abducts digits, extends fingers innervation : ulnar nerve

what branch of the median nerve is not affected by carpal tunnel? why?

palmar cutaneous branch of the median nerve becauses it arises proximal to the carpal tunnel

what arteries form the superficicial palmar arch?

the superficial branch of the ulnar atery and the superficial branch if the radial artery

what do the names of the thenar and hypothenar compartment muscles have in common?

they are the same except thenar compartment is pollicis and the hypothenar and digiti minimi