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Biomechanics > Biomechanics Quiz 10 > Flashcards

Biomechanics Quiz 10 Flashcards

1
Q

Eight Carpal Bones are also called what?

A

“functional spacer”

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2
Q

Primary Articulation of the wrist:

A

-Radiocarpal Joint

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3
Q

2 parts of the distal forearm:

A
  1. styloid process of radius / ulna

2. distal radius

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4
Q

distal forearm - angled how many degrees and toward what?

A

25* toward ulna (medial)

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5
Q

the ulnar tilt allows for what?

A

greater ulnar deviation

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6
Q

radial deviation is limited by

A

styloid process of radius

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7
Q

radial deviation is known as what?

A

abduction

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8
Q

ulnar deviation is known as what?

A

adduction

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9
Q

the proximal row of carpal bones (lateral to medial) are mounted in what fashion?

which bones are they?

A

relatively loose fashion

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10
Q

how are the distal row (lateral to medial) of carpal bones bound?

which bones are they?

A

tightly by strong ligaments

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11
Q

what does the distal row provide?

A

rigid and stable base for articulations wth MCs

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12
Q

the transverse carpal ligament connects what bones?

A

medial bones: (hook of hamate and pisiform) to the lateral bones: (tubercles of scaphoid and trapezium)

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13
Q

What does the Carpal Tunnel prevent?

A

Prevents “bowstringing”

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14
Q

passageway of carpal tunnel is for what?

A

for median nerve and extrinsic finger flexor tendons

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15
Q

how many finger flexors in carpal tunnel

A

8 finger flexor tendons

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16
Q

Intercarpal Joints - what kind of movements occur?

A

small gliding movements

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17
Q

what are the proximal components of radoiocarpal joint?

A

-concave radius and adjacent articular disc

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18
Q

what are the Distal components of radoiocarpal joint?

A
  • convex proximal surfaces of scaphoid and lunate

- triquetrum

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19
Q

what does TFCC stand for?

A

triangular fibrocartilage complex

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20
Q

Osteokinematicsof Wrist Motion - how many degrees of angular freedom (circumduction)

A

2*

21
Q

wrist motion - axes pass through which bone?

A

capitate

22
Q

Wrist ROM: flexion

A

0 to 70-85*

23
Q

Wrist ROM: Extension

A

0 to 60-75⁰

24
Q

Wrist ROM: Deviations

A
  • Ulnar: 0 to 35-40⁰

- Radial: 0 to 15-20⁰

25
Q

when Falling on Outstretched Hand - what is the injury?

A

colles fracture

26
Q

colles fractured fractures what?

A

Scaphoid Fracture

27
Q

wrist extensors - proximal attachment is where?

A

on or near lateral epicondyle

28
Q

what is the role of the wrist extensors?

A

being able to make a fist

29
Q

degrees of extension / deviation of wrist extensors?

A

30-35* wrist extension

and 5* ulnar deviation

30
Q

Grip strength reduced with what kind of movement?

A

wrist flexion (shortened finger flexors)

31
Q

wrist flexors proximal attachment on or near

A

on or near Medial Epicondyle

32
Q

HAND has how many bones, articulations, and muscles?

A

19 bones
19 articulations
29 muscles

33
Q

arthrology: Finger Movements:

A
  1. Flexion/Extension (sagittal)

2. Abduction/Adduction (frontal) middle finger is reference

34
Q

arthrology: Thumb Movements: • Opposition describes what?

A

movement of thumb across the palm, making direct contact with the tip of any finger.

35
Q

arthrology: Thumb Movements: • Reposition describes what?

A

from full opposition back to anatomic position

36
Q

what type of joints are the Carpometacarpal (CMC) Joints

A

synovial joint

37
Q

Carpometacarpal (CMC) Joints have what kind of movement?

A

sliding and gliding

38
Q

Carpometacarpal (CMC) Joints are surrounded by what?

A

by joint capsules and multiple ligaments

39
Q

for the hand, abd/add occur in what plane?

A

sagittal plane

40
Q

for the hand, m/l occur in what plane?

A

the frontal plane

41
Q

the Carpometacarpal is what type of joint?

A

saddle joint – biaxial, which allows for opposition

42
Q

the Carpometacarpal is a loose capsule which allows for what?

A

great ROM

43
Q

CMC: what is opposition?

A

Composite of other primary motions

44
Q

Metacarpophalangeal Joints are which digits #?

A

Digits 2-5

45
Q

Metacarpophalangeal Joints: flexion and extension occur in what plane?

A

sagittal

46
Q

Metacarpophalangeal Joints: Abduction/Adduction occur in what plane?

A

frontal

47
Q

MetacarpophalangealJoint (Thumb) is what type of joint?

A

hinge joint for flexion/extension

48
Q

Interphalangeal Joints (Digits 1-5) are what kind of joints? on what plane?

A

hinge joints for flexion / extension

sagittal

Biomechanics (10 decks)

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