Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Clinical Anatomy > 3.5 Arm, FA, Wrist > Flashcards

3.5 Arm, FA, Wrist Flashcards

1
Q

proximal radius & ulna

A
  • radioulnar joint
    • synovial- pivot
    • diarthrois- unixial (y-axis)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

middle radius & ulna

A
  • radioulnar joint
    - syndesmosis structural joint
    - amphiarthrosis functional joint
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

distal radius & ulna

A
  • radioulnar joint
    • synovial- pivot
    • diarthrosis- uniaxial (y-axis)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Wrist and Hand complex includes

A
  • distal radius (&ulna)
    • ulna does not articulate with carpal bones
      - too short
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

how many carpal bones?

A

8

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

how many metacarpals?

A

5

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

digits & pollex

A
  • proximal phalanges (5)
  • middle phalanges (4)
  • distal phalanges (5)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Metacarpophalangeal joint

-type?

A
  • head of MC articulates w/base of phalanx
  • synovial condyloid joint
  • biaxial
  • except thumb!
    - uniaxial hinge
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Interphalangeal Joint

A
  • head of prox. phalanx articulates w/ base of distal phalanx
  • synovial hinge joint
  • uniaxial
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

which rotates which is passive?

A

-radius rotates around relatively passive ulna!

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

radioulnar joints: Proximal

A

-Radial Head- Radial notchof ulna

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

radioulnar joints: distal

A

-ulnar head-ulnar notch of radius

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

pronation accomplished by

A

pronator teres mm.

pronator quadratus mm.

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

pronator teres mm. innervated by…

A

median n.

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

pronator quadratus innervated by…

A

anterior interosseous n. ( of median n.)

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

supination accomplished by

A

supinator mm. (extensor side)

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

supinator mm. innervated by

A

radial n.

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

biceps brachii mm.

innervated by

A

(during flexion)

-innervated by musculocutaneous n.

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

ARTICULAR SURFACE:

distal end of ulna (head)

A
  • articular fossa for triangular ligament (TFCC)

- styloid process projects posterrior (cone shaped, easily palpated)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

ARTIC SURF:

distal end of radius

A
  • articular fossa for :
    • lunate (medial)
    • scaphoid (lateral)
  • greater distal projection
  • styloid is lateral with lateral projection
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

angle of inclination is…

A

23 deg.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

only distal articulation with carpals is

A

radius (wrist is radiocarpal joint)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

distal radioulnar joint neurovascular supply

A
  • ant/post interosseous a/v

- ant (median)/post (radial) interosseous n.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Radioulnar joint cavity shape…

accommodates…

A
  • “L-shaped cavity”
  • Accommodates:
    • ulnar notch articulating surface with (TFCC)
  • RU Sacciform Recess for movement
  • Triangular Radioulnar Disc
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
TFCC
triangular fibrocartilaginous complex
26
Triangular fibrocartilaginous complex
- triangular-shaped radioulnar disc ("triangular ligament") - ligamentous bands frames disc - dorsal radioulnar ligament - palmar radioulnar lig
27
TFCC attach from
- ulnar styloid process to ulnar notch of radius - fills space of shorter distal ulna - ligaments stabilizes & suspends ulna to the triquetrum & lunate!!
28
TFCC allows for
greater ROM at wrist
29
TFCC: triangular-shaped radioulnar disc ("triangular ligament")
- ligamentous bands frames disc - palmar radioulnar lig - dorsal radioulnar lig
30
ulna variance
- neutral - positive - negative
31
neutral (normal) ulnar variance
0.9mm ~80% of load is born by radius ~20% by ulna
32
positive ulnar variance
- long ulna (in relation to radius) - distal end - increase load born by ulno-carpal joint from 18% to 42%
33
negative ulnar variance
- short ulna (in relation to radius) - distal end - decrease load borne by the ulno-carpal joint to 4.3%
34
positive ulnar variance leads to...
-pressure of carpals on TFCC may reduce space, thinning and damage of TFCC
35
negative ulnar variance leads to...
- more P on radiocarpal joint | - possible necrosis of lunate (indirectly)
36
TFCC injuries
-tear, stretch, compression of TFCC -mechanism of injury =T1 or T2
37
T1 TFCC
T1- Traumatic Injury(???) - fall on extended wrist usually while pronated - traction injury on ulnar side
38
T2 TFCC
T2- degenerative - over 50 years - positive ulnar variance - "ulnar impaction syndrome" - "Ulnocarpal abutment syndrome" - arthritis - gout
39
a third mechanism of injury of TFCC
- repetitive motion injury | - bowing, tennis, hammering, power drill, etc.
40
Sx of TFCC
- wrist pain at ulnar side - sometimes overall, diffuse pain - made worst woth pronation-supination, or abd, add - swelling - weakness & instab. (esp. with styloid fx) - crepitus; "catching"
41
Tx of TFCC
- rest (splint/cast) - NSAIDS - Steroid injection - PT (strengthening exercises and ROM) - Surgery (arthroscopic) - debride - suture-repair - ulnar length reduction
42
Colles' Fracture mechanism
- mechanism - fall on outstretched hand (foosh) - force + hyperextension (forearm forced dorsally)
43
Colles' fx results in:
- distal fx to radius - broken distal end projects dorsal - proximal end may project ventral/volar (overriding fractured end)
44
an avulsed what in a colles' fx may be present?
-styloid process of ulna and radius
45
X-rays of colles' fx may reveal what?
- reduced radial angle of inclination - displays "dinner force deformity" - broken distal end projects posterior, while proximal end my project anterior (overriding fractured end)
46
Radiocarpal Joint
SLTQ - capsule envelops distal radius & ulna, and proximal carpals (scaphoid, lunate, triq.) - numerous synovial membrane folds
47
Intercarpal joint
- continous capsule for intercarpal joint cavities & carpometacarpal joint - EXCEPT: carpometacarpal joint of thumb - fibrous capsule helps unite bones
48
Wrist joint (radiocarpal ligaments)- how many?
-four main ligaments
49
What are the four main ligaments of the wrist joint called?
- palmar radiocarpal ligaments - dorsal radiocarpal lig - ulnar (or medial) collateral ligaments - radial (or lateral) collateral ligaments
50
ligaments provide support to pull hand along for ______ and ________.
-supination and pronation
51
Kienbock's Disease
- avascular necrosis of LUNATE BONE | - most commonly dislocated carpal bone!
52
causes of keinbock's disease
- injury (although not a direct cause) - negative ulnar variance - increased compression from radius (b/c lunate articulates with rad)
53
symp. of keinbock's
- pain and swelling in MEDIAL wrist - reduced ROM and weakness - pain with SUPINATION or ADDUCTION
54
dx OF KEINBOCK'S
- xray shows: - fibrosis of bone (bright lunate on xrays) - fx - collapse of lunate
55
Radiocarpal joint (radius + scaphoid/ lunate)
- synovial condyloid (ellipsoidal) joint | - biaxial (x and y axes)
56
Intercarpal joints include-
- joints b/w adjacent carpal bones w/in rows - midcarpal joint - pisotriquetral joint
57
Midcarpal joint
- between proximal and distal rows - lateral and medial midcarpal joint - acts as saddle joint
58
Pisotriquetral joint
- b/w pisiform and triquetrum - synovial gliding joint - nonaxial
59
Intercapral ligaments consist of:
- palmar ligaments - dorsal intercarpal ligaments - interosseous ligaments - ligaments specifically names for bones that articulate
60
Carpometacarpal joint (CMC)
-b/w distal rows and metacarpals
61
Intermetacarpal joint (IMC)
- synovial gliding joint - nonaxial - except thumb (own capsule) - synovial saddle and biaxial

Clinical Anatomy (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions