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Block 1: Upper Limb > Wrist & Hand - General Information > Flashcards

Wrist & Hand - General Information Flashcards

1
Q

Creases on your palm are actually

A

attachments of skin to superficial palmar aponeuroses

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2
Q

Superficial palmar aponeurosis spilts into what two layers

A

superficial and deep

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3
Q

Functions of palmar aponeurosis (3)

A

minimize slippage during grasping activities (stabilize palmar skin)

protect underlying mm, n, vessels

help create carpal tunnel (deep layer of PA)

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4
Q

Extensor and flexor retinaculum mechanical function

A

maintain more constant moment arm at PIP and DIP that each tendon crosses

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5
Q

Flexor retinaculum of fingers is composed of (2)

A

cruciform ligaments
annular ligaments (A1-A5)

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6
Q

5 mm groups of hand?

A

Thenar eminence

Hypothenar eminence

Lumbricals

PADs

DABs

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7
Q

What composes the thenar eminence?

*** (All For One And) One For All

A

(4 layers, sup to deep:)

abductor pollicis brevis
flexor pollicis brevis
opponens pollicis
adductor pollicis

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8
Q

What composes the hypothenar eminence?

A

(3 mm)

abductor digiti minimi
flexor digiti minimi
opponens digiti minimi

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9
Q

Which lumbricals are unipennate or bipennate?

*** “LU MB ricals”

A

lateral 2 - unipennate

medial 2 - bipennate

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10
Q

DABs are unipennate or bipennate?

A

bipennate

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11
Q

What is the dorsal digital expansion?

A

triangular aponeurosis through which the extensor digitorum, interossei, and lumbricals exert their coordinated actions at the MCP and IP joints

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12
Q

Tendon of DDE trifurcates over the

A

proximal phalanx

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13
Q

The central tendon of the DDE inserts on

A

dorsal base of the middle phalanx

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14
Q

Two lateral bands of the DDE travel

A

on either side of the PIP and inserts on the dorsal base of the distal phalanx

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15
Q

The trifurcation of the DDE is held in place by the

A

transverse fibers of the expansion

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16
Q

The tendon of an _______ commingles with the lateral band of ED at the _______ and becomes an integral part to it

A

interosseous muscle

middle phalanx

17
Q

On the radial side the tendon of the ________ joins the ED at the ______, just distal to the interosseous tendon

A

lumbrical

PIP

18
Q

Name the carpals (8)

A

scaphoid
lunate
triquetrium
pisiform
trapezium
trapezoid
capitate
hamate

19
Q

Pisiform lies ______ to the triquetrum

20
Q

The pisiform and hook of hamate form the

***passage of ulnar n is here

A

tunnel of Guyon

21
Q

What travels in the tunnel of Guyon?

22
Q

FOOSH injuries typically result in what carpal being fractured?

A

usually through the narrow waist of the scaphoid

23
Q

blood flow disrupted distal to proximal

poor prognosis - malunion (fractured bone heals in an abnormal position) or nonunion (A nonunion occurs when a fractured bone fails to heal after an extended recovery period)

pain on palpation of anatomical snuff box

often requires extensive mobilization and surgery

A

scaphoid fracture

24
Q

The scaphoid bone is aka…

25
Q

What allows for the extensive ROM at the 1st CMC joint?

A

base of 1st MC is saddle-shaped to articulate with trapezium, allows greater motion

26
Q

What movements are at the first MCP joint? (4)

A

flex/extend

abduction/adduction

IR/ER

opposition/reposition

27
Q

At your MCP joints, what is concave and what is convex?

A

heads of MC are convex

bases of proximal phalanges are concave

28
Q

What movements are at the MCP (knuckle) joints? (2)

A

flex/extend

abduction/adduction

29
Q

AT IP joints, what is concave and what is convex?

(similar to MCP joints)

A

concave proximal base

convex distal head

30
Q

Where are the sesamoid bones around the thumb?

A

embedded in tendons of FPB and AddP

31
Q

What runs in between the sesamoid bones of the thumb?

32
Q

What are the joints of the wrist? (2)

A

DRUJ
radiocarpal joint

33
Q

Distal ulna is separated from proximal row of carpals by the…

A

triangular fibrocartilage complex (TFCC)

34
Q

Disruption of TFCC may lead to…

A

carpal instability

early osteoarthritis

35
Q

Borders of carpal tunnel

A

Roof - flexor retinaculum

Radial border - scaphoid tubercle, trapezium tubercle

Ulnar border - pisiform, hook of hamate

36
Q

Contents of carpal tunnel (10)

***F I spilled my meds. Dear, don’t panic.

A

FDS (4)

FDP (4)

FPL (1)

median n (1)

37
Q

T or F; Flexor Carpi Radialis tendon is within carpal tunnel

A

FALSE

FCR tendon lies just lateral to carpal tunnel as it passes through its groove on the trapezium

38
Q

Proximal row of carpal bones (4)

A
  1. scaphoid
  2. lunate
  3. triquetrum
  4. pisiform
39
Q

Distal row of carpal bones

A
  1. trapezium
  2. trapezoid
  3. capitate
  4. hamate

Block 1: Upper Limb (34 decks)

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