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Med01 Muscoskeletal system > Anatomy of the hand > Flashcards

Anatomy of the hand Flashcards

1
Q

BONES OF THE wrist
(8)
So Long to pinky, here comes the Taehyung

A

from thumb around in clockwise direction: when ur right hand is facing upwards

So Long to prince, here comes the Taehyung

BOTTOM (proximal)
Scaphoid
Lunate 
Triquetrium 
Pisiform
TOP (distal) 
Hamate 
Capitate
Trapezoid ( D comes before m)
Trapezium
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2
Q

what connective sheath connects carpal tunnel ?

which tendon runs in the middle on top of it ?

A

flexor retinaculum

-tendon of palmaris longus

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3
Q

deep to flexor retinaculum (carpal tunnel )
(4)
fd x2
fp

A

1- median nerve
2-tendon of Flexor digitorum superficially x4
3-tendon of Flexor digitorium Profundus x4
4-Tendon of flexor pollicius
longus

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4
Q

what is the wrist joint
(3)
-whats involved
-what is its class

A
  • radiocarpal joint
    -distal end of the radius, scaphoid, lunate, and triquetrum
    -joint = condyloid joint
    ULNA = NOT INVOLVED = articular disc between ulnar and other joints.
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5
Q

Outline midcarpal joint (2)

A
  • between 2 rows of carpal bones

- Plane joint

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6
Q

Outline the carpometacarpal joint

Carpometacarpal joint of thumb?

A
  • between the distal row of carpal bone + proximal end of metacarpal bones
  • 2-5 joints
  • gliding joint

Thumb= saddle joint

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7
Q

bones of the hand?

3

A

1- carpal bones (so long to pinky here comes taehyung )
2-Metacarpals
3-phalanges

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8
Q

metacarpophalangeal joint class

A

condyloid joint( bi axial movement forwards backwards side to side)

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9
Q

Interphalangeal joint?

A

hinge joint

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10
Q

what are the movements of the wrist and which part of the arms are involved?
(4)

A

1-flexion -anterior compartmetn of forearm
2-Extension -posterior compartment of forearm
3-Ulnar= medial deviation and adduction
4-Radial = lateral deviation and abduction

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11
Q

what are the two groups of teh intrinsic muscles of the hand

A

1) thenar muscles = base of thumb

2) Hypothenar eminence =base of little finger

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12
Q

three thenar muscles ?
(3)
AbFlOp

A

1-Abductor pollicis brevis (away from midline of hand)
2-Flexor pollicis brevis (flexes thumb )
3-Opponens policies (opposition of thub)

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13
Q

three hypothenar eminece ?
(3)
same ABFLOP

A

1- Abductor digiti minimi (away from midline )
2-Flexor digiti minimi brevis (flexes little finger )
3-Opponents digiti minimi (opposition of little finger)

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14
Q 
what are the lumbricals ?
(4)
which muscle do they originate from ?
movement 
innervation
A

x4 Originates from flexor Digitorum Profundus
1- passes the metacarpophalangeal joint – insert into the exterior expansion hood
-flexion of metacarpophalangeal joint
-extension of the interphalangeal joint
lateral 2= median (1,2)
medial 2 = ulnar nerve (3,4)

causes ( ross like ) L shape .

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15
Q

what is the dorsal interossei?
DAb
(3)
nerve?

A
  • muscles in between the metacarpals
  • ulnar nerve
  • causes ABDUCTION
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16
Q 
Innervation of the anterior forearm
Innervation of hand 
Innervation of the posterior forearm
(3)
Half Loaf
A

1-anterior forearm = median nerve EXCEPT FDP + FCU
2-Hand= ULNAR never except : lateral 2 lumbericals , opponents pollicis + thenar imminence (abductor pollicis brevis , flexor pollicis brevis)

Half LOAF 
half lumbericals = lateral two 
Opponens pollicis 
Abductor pollicis 
Flexor pollicis brevis

3- posterior compartment = radial nerve

17
Q

palamar interossei

pAD

A

-Palmar surfaces 2nd,4th and 5th fingers
X3 FOR P
-ADDUCTION , originate from metacarpals

18
Q

extrinsic muscle (1)

A

found in forearm, not in hand

19
Q

how would you remember what the palmar and dorsal interssei do ?(2)

A

PAd- palmar = aDduction

DAb- dorsal = aBduction

20
Q

adductor pollicis?

describe
innervation

A

triangular hood muscles over the thumb, index and middle finger

Attaches from thumb
INNERVATION =ULNAR NERVE

posterior hand

21
Q

which joint is only acted on by flexor digitorum profundus

A

goes all the way to the end of the phalanges

distal interphalangeal joint

22
Q

power grip
CSH
(3)

precision grip
PPPL
(4)

just know the difference

A

strength + force power grips:
Cylindrical
Spherical
Hook

precision grip:
Pinch
Pincer
Prehension 
Lumbrical
23
Q 
power grips?
which 2 groups of muscles 
(name muscles : 6 muscles 
for group 1 
group 2-6)

group 1 :
FCX2
P1 FP1
FDX2

group 2:
AFO X2
+ 2 other groups

A

strong (cylindrical, spherical, hook)
long flexors muscles of the hand ( anterior forearm :
1-flexor carpi radialis, ulnaris
2-palmaris longus
3-flexor digitorum profundus and superficialis
4-flexor pollicis longus

short INTRINSIC muscles of the hand :
AFO for thenar and hypothenar eminence
lumbricals
dorsal and palmar interossei

24
Q

radiocarpal joint muscles

3

A

muscles of the forearm :
Flexion= flexor carpi ulnaris and flexor carpi radialis,

flexor digitorum superficialis.

25
Q

metacarpophalangeal joint muscle
(3)
knuckles

A

In the MP joint, there are seven muscles between the bones and four other muscles that act as flexors.

  • intrinsic muscles
  • extensor digitorum acts as the extensor.
26
Q

PIP joint muscles
proximal interphalangeal
flexors ?(2)

A
  • flexor digitorum superficialis

- flexor digitorum profundus.

27
Q

DIP joint muscles, distal interphalangeal

2

A
  • FLEXOR: flexor digitorum profundus.

- The extensors of both the PIP and DIP joints = muscles between the bones and internal muscles of the hand.

28
Q

precision grips muscles

4

A

INTRINSIC MUSCLES OF THE HAND :

These are the thenar, hypothenar, interossei and the lumbrical muscle

29
Q 
what is the anatomical snuffbox ?
point to it on ur hand 
- base of triangle (1)
-medial border (1)
-lateral boundaries (2)
-floor (2)
-roof(1)

what does it contain (2)

A

1- triangular space in your hand

base = styloid process of radius

medial border=extensor pollicis longus

lateral boundaries :
1-extensor pollicis brevis
2-Abductor pollicis longus

floor: carpal bones = scaphoid + trapezium

roof = skin

contains :
1-radial artery
2-radial nerve

30
Q

palmar aspect innervation of hand
anterior
(3)

A 
1-thumb half =radial 
2-thumb half+2,3,4( half) =median 
3-4.5+5 = ulnar 
from lateral to medial :
radial , median ,rulnar
31
Q

Dorsal aspect of the hand innervation

3

A

1- thumb+2,3,4(half)= radial nerve
2- finger tips of thumb ,1,2,3,4(half) = median nerve
3-4.5,5 = ulnar nerve

32
Q

what nerve supplies the LOAF muscles of the hand , and what are they ?
(4)

A
  • Median nerve

LOAF muscles

Lateral two lumbricals
Opponens pollis
Abductor pollis brevis
Flexor pollis brevis

Med01 Muscoskeletal system (11 decks)

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