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Flashcards ni Mang Inamo > Hands, Forearm, Wrist > Flashcards

Hands, Forearm, Wrist Flashcards

1
Q

● Positions the hand.
● Provides a stable platform from which the hand
functions.
● Finely tuned hand positioning.
● Global positioning of the hand.

A

Wrist

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2
Q

● Predominant part of the body serving many purpose.
● Contains the palm and fingers.
○ Both sturdy and mobile.
● Complex, multipurpose organ
● As a prehensile organ, it can grasp with forces
exceeding 100 lb (445 N or 45 kg) or manipulate a
delicate thread
● Conform around objects
● Pushing and pulling

A

Hand

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3
Q

“Pollex”

A

Thumb

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4
Q

Often used to point, and pointing is a
method of making things clearer and it is
the purpose of an index

A

Index/Pointing/Forefinger

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5
Q

Longest finger of the hand

A

Middle Finger

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6
Q

It was believed that this finger contained a
“vein of love” that flowed directly to the
heart

A

Ring finger

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7
Q

Smallest finger

A

Pinky/Little finger

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8
Q

primary forearm bone
of the wrist

A

radius.

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9
Q

interact with the radius to form the
wrist joint.

A

(Scaphoid +
Lunate

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10
Q

● Not in direct contact with the
carpal bones.
● Fibrocartilaginous disc
separates the ulna from the
carpal bones.
● Distal portion of the ulna is an
important part of the wrist.

A

Distal Ulna

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11
Q

is a bony
projection, easily palpated with
the forearm pronated, on the
ulnar side of the wrist

A

Ulnar styloid process

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12
Q

a depression at the base
of this styloid process and
provides attachment for the
fibrocartilaginous disc.

A

Fovea

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13
Q

a concave articular
surface allowing ulnar
articulation with the
fibrocartilaginous disc

A

Pole

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14
Q

● Lies about 1/3 of the wrist’s width
from the radial styloid process.
● Has grooves on either side of it
that serve as a pulley for the:
○ extensor pollicis longus
tendon on the ulnar side
○ extensor digitorum and
extensor indicis tendons on
the radial side

A

Lister’s Tubercle

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15
Q

● Distal projection on the
radial surface of the radius.
● More distal than ulnar
styloid process.
● Ulnar and radial styloid
processes serve as
attachment sites for the
ulnar and radial carpal
collateral ligaments,
respectively

A

Radial Styloid Process

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16
Q

p● Sigmoid notch
● On the ulnar (lateral)
aspect of the distal radius
is the articulating surface
for the distal radioulnar
joint

A

Ulnar notch

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17
Q

PROXIMAL ROW

A

○ Scaphoid
○ Lunate
○ Triquetrum
○ Pisiform

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18
Q

DISTAL ROW

A

○ Trapezium
○ Trapezoid
○ Capitate
○ Hamate

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19
Q

● Navicular
● Most frequently
fractured carpal bone
● Floor of the anatomic
snuffbox

A

Scaphoid

20
Q

Most frequently
dislocated carpal bone

A

Lunate

21
Q

“Triangular”

A

Triquetrum

22
Q

Pea-shaped

A

Pisiform

23
Q

“Greater multangular”

A

Trapezium

24
Q

“Lesser multangular”

A

Trapezoid

25
Q

● Occupying a central position at
the wrist (in line with the middle
finger)
● Os magnum
● Best approached from the
dorsum, where a slight
depression indicates its location
● The axis of motion for ulnar and
radial deviation goes through
this bone in a dorsopalmar
direction

A

Capitate

26
Q

It has a hooked process
on its palmar side, called
the hook of the hamate

A

Hamate

27
Q

● A triangular skin depression on
the lateral side of the wrist that is
bounded medially by the tendon
of the extensor pollicis longus and
laterally by the tendons of the
abductor pollicis longus and
extensor pollicis brevis
● Its clinical importance lies in the
fact that the scaphoid bone is
most easily palpated here and that
the pulsations of the radial artery
can be felt here

A

Anatomic Snuffbox

28
Q

○ fracture of the 5th
metacarpal neck
○ clenched fist striking a hard
object

A

BOXER’S FRACTURE

29
Q

○ fracture of the 1st
metacarpal base
○ forced hyperabduction of the
thumb

A

BENNETT’S FRACTURE

30
Q

2 phalanges of the thumb

A

○ Proximal
○ Distal

31
Q

.3 phalanges of the 2nd to
5th digits

A

○ Proximal
○ Middle
○ Dista

32
Q

● Wide mobility of the
hand
● Great structural
stability in the wrist
● Allows the hand an
extensive degree of
function
● Ellipsoidal joint
● 2 DOF
● 15 bones
● 17 joints
● Extensive

A

Wrist Joint

33
Q

● Biconcave: Distal end of radius
● Biconvex: Proximal articulating surface of the
scaphoid and lunate
● 2 DOF
● Motions: flexion, extension, radial deviation,
ulnar deviation

A

Radiocarpal Joint

34
Q

● Formed by the proximal and distal carpal rows.
● The scaphoid articulates with the trapezium,
trapezoid, and capitate.
● Lunate articulates with the capitate.
● Triquetrum articulates with the hamate.
● Wrist motions: flexion, extension, and radial and
ulnar deviation

A

Midcarpal Joint

35
Q

● Each digit has: CMC +
MCP
● Each of the 4 fingers
has: PIP + DIP

A

feel ko important

36
Q

minimal movement

A

2nd and 3rd CMC joint

37
Q

least mobile (central pillar of
the hand)

A

3rd CMC joint

38
Q

10 to 15 degrees dorsovolar
movement

A

4th CMC joint

39
Q

● Trapezium + Base of First
Metacarpal
● Saddle joint
● Motions: flexion,
extension, abduction,
adduction, opposition,
reposition.

A

Carpometacarpal Joint of Thumb

40
Q

● Condyloid type
● 2 DOF
● Flexion, extension,
abduction, and adduction.
○ Convex: Head of
metacarpals
○ Concave: Base of
proximal phalanges

A

Metacarpophalangeal Joints

41
Q

● 2nd to 5th digit = DIP and PIP
● Thumb = Interphalangeal joint
● 1 DOF
● Motion: flexion and extension
● (+) volar plate mechanism: prevents hyperextension

A

Interphalangeal Joints

42
Q

6 Extensor Tunnels
● Tunnel 1:
● Tunnel 2:
● Tunnel 3:
● Tunnel 4:
● Tunnel 5:
● Tunnel 6:

A

6 Extensor Tunnels
● Tunnel 1: APL + EPB
● Tunnel 2: ECRL + ECRB
● Tunnel 3: EPL
● Tunnel 4: ED + EI
● Tunnel 5: EDM
● Tunnel 6: ECU

43
Q

a
fibrous band connecting
the proximal phalanx
and distal sheath that
covers the proximal and
distal interphalangeal
joints and middle
phalanx

A

Extensor hood

44
Q

the flexor
digitorum superficialis and
profundus tendons are
enclosed in synovial-lined
tunnels, which are maintained
against the palmar surfaces of
the phalanges by pulleys.
○ Annular pulleys
○ Cruciate pulleys

A

Flexor pulleys

45
Q

● Consists of a burning pain
or “pins and needles” along
the distribution of the
median nerve to the lateral
three and a half fingers and
weakness of the thenar
muscles.
● It is produced by
compression of the median
nerve within the tunnel

A

Carpal Tunnel Syndrome

46
Q

● There is a palpable and even
audible snapping when a
patient is asked to flex and
extend the fingers.
● It is caused by the presence of
a localized swelling of one of
the long flexor tendons that
catches on a narrowing of the
fibrous flexor sheath anterior
to the metacarpophalangeal
joint. It may take place either in
flexion or in extension.

A

Trigger Finger

Flashcards ni Mang Inamo (16 decks)

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