Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Appendicular anatomy > hand- muscles and function > Flashcards

hand- muscles and function Flashcards

1
Q

thenar eminence

A

lasted rounded contour of the radial palm. precision movements and pincer grip. 4 muscles- FPB, ABP, opponenes pollicis, adductor pollicis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Hypothenar eminence

A

ADM, FDM, Opponen digit mini, palmaris brevis
medial rounded contour of ulna palm, grasping large objects, opposition of little finger, increasing the hallow of the palm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

intermediate muscles

A

11 act on finger, 1 on thumb, dexterity- fine movements of fingers, grasp, maintain fist
4 palmer interossei, 4 dorsi interossei, 4 lumbricals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

origin and insertions- FPB

A

Origin- flexor retinaculum, trapezium (deep- capitae, trapezoid)
insertion- radial side base proximal side base of phalanx of thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

NS and action- FPB

A

median nerve T1, deep part- ulna nerve 1,

action- flexion at MCP, CMC, medial rotation of thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

origin and insertion- abductor pollicis brevis

A

from- flexor retinaculum, scaphoid, trapezium

to- radial side of the bae of the proximal phalanx of thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

NS and action- abductor pollicis brevis

A

median nerve T1,

action- abduction at CMC/ MCP joints of thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

origin and insertion- opponenes pollicis

A

covered by APB and FPB, origin- flexor retinaculum, trapezium, to- whole length lateral half of anterior surface of 1st MC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

NS and action- opponenes pollicis

A

NS median nerve T1, action- opposition involves movement of abduction/ MR/ flexion/adduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

origin and insertion- adductor pollicis

A

found in web space of thumb. origin- oblique head- tendon FCR, bases 2-3 MC, trapezoid, capitae
transverse- anterior surface shaft of 3rd MC
to- medial side base prox phalanx of thumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

origin and insertion- abductor digit minimi

A

from- pisiform, pisohamate, pisometacarpal ligament, tendon FCU to ulna side
to- proximal phalanx of little finger and DDE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

NS and action abductor digiti minimi

A

NS- ulna nerve T1

Action- abd little finger, flexion MCP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

origin and insertion- FDM

A

sometimes absent
origin- hook of hamate, flexor retinaculum
to base proximal phalanx of little fingere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

NS and action- FDM

A

NS- ulna nerve T1

Action- flexion MCP joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

origin and insertions- opponens digiti minimi

A

origin- hook of hamate/ flexor retinaculum

insertion- shaft 5th mc

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

NS and action- opponens digiti minimi

A

NS- ulna nerve T1

Action- opposition 5th digit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

origin and insertion- palmaris brevis

A

origin- flexor retinaculum and palmer aponeurosis

insertion- skin of palm into dermis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

NS and action- palmaris brevis

A

ulna nerve C8, T1

Action- steadies and corrugates skin of palm to help with grip

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

dorsal interossei action and nerve supply

A

dorsal/ dual orgin, abduction (DAB)
ulna nerve C8, T1
1st DI- pulls index finger into abduction
2nd DI- pulls middle finger to abduction
3rd- return abducted middle finger to midline, then abduct opposite side
4th DI- abducts ringer finger from middle finger

20
Q

Dorsal interossei origin and insertion

A

from adjacent sides of MC to proximal phalanx and DDE

21
Q

palm interossei- action and nerve supply

A 
action return digits to starting position (adduction) 
(PADD)
ulna nerve C8 and T1
1st PI- adduction of thumb
2nd PI- index finger to middle finger
3rd PI- returns 4th MC to middle finger
4th- returns little finger to adduction
22
Q

palmer interossei- origin and insertion

A

from MC to base of proximal phalanx and DDE (except middle finger)

23
Q

function of interossei

A

extension of the IP, flexion at MCP joints, Abd/ add of MCPs

prevents hypo extension of the MCP, important in prehension activities

24
Q

lumbricals origin and insertion

A

from tendon of FDP to DDE
radial 2 are unipennate
ulna 2- bipennate

25
Q

lumbricals nerve supply

A

I and II meidan nerve C7,8 (radial 2)

III and IV ulna nerve C7, 8 (ulna 2)

26
Q

dorsal hood

A

extensor hood- divides into 2 slips to base of distal phalanx and base of middle phalanx
allows one muscle to flex MCP and extend IP

27
Q

The hand

A

an instrument of manipulation endowed with fine sensory discrimination
important to grip and manipulate in the activities of daily living and to inform us of our surroundings

28
Q

5 functions of hand

A

manipulation, sensation, stability, protection, communication

29
Q

motor innervation issues- posterior interosseous nerve

A

extrinsic muscles of the hand, wrist extensors, EPL and EPB and APL
dropped wrist- poor grip

30
Q

motor innervation issues- ulnar nerve

A

hypothenar muscles, interossei and Add pollicis and half of FPB
Leads to clawed hand

31
Q

motor innervation issues- median nerve

A

thenar muscles and finger flexors, loss of precision

32
Q

nerve supply of hand

A

ulna nerve- both palmer and dorsal aspects of ulna side of hand- all 5th MC and half og 4th MC
3.5 digits and palm- median nerve, innervates dorsal aspect of half of medial 3.5 digits
remaining dorsal hand suppled by radial nerve

33
Q

arches of hand

A

2 transverse arches
1 longitudinal arch
1 oblique arch
arches aid function of hand. they allow the hand to conform to objects

34
Q

transverse arches- carpal arch (proximal)

A

formed by carpal bones, concave in shape and allows little movements- has key stone effect

35
Q

transverse arches- metacarpal arch (Disatal)

A

formed by MC heads. it can widen and flatten, providing stability and mobility in hand

36
Q

longitudinal arch

A

formed by carpal bones, MC bones, and the corresponding phalanges. it assumes a wide variety of shape

37
Q

oblique arch

A

formed by thumb as it opposes each of finger

4 arches- from thumb tip to each finger

38
Q

what is the palmer gutter (oblique arch)

A

palmer gutter- is a gutter which runs obliquely across the various oblique arches the palm. it passes from base if hypothenar eminence to head of 2nd MC

39
Q

power grips- types

A

palmer grip, hook grip

40
Q

power grips- palmer grips

A

involves whole hand. most powerful, thumb acts as buttress with fingers closing around the object. wrist in synergic extension, long flexors and thenar muscles are active.

41
Q

power grips- adapted palmer grips

A

spherical grasp, cylindrical grasp

42
Q

prehension

A

the use of hands and fingers to grasp, pick up objects

power grips and precision grips

43
Q

precision grips

A

involves skillful placing of small objects between thumb and finger with manipulation, less strength of muscles contracting to produce and control fine movements, good sensation is essential to carry out precision movements

44
Q

precision grips- pincer grip, and pad to pad grip

A

pincer grip- terminal opposition- tip of finger to tip of thumb- finest and most precise
pad to pad- sub terminal opposition- most common, pad to pad movements

45
Q

precision grips- key grip, adduction grip

A

key- subterminal lateral opposition or lateral prehension- thumb pad to lateral side of middle phalanx of index finger- powerful and strongest
adduction grip- generally weakm with limited precision

Appendicular anatomy (20 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions