Biomechanics Quiz 10

Question 1

Eight Carpal Bones are also called what?

Answer 1

“functional spacer”

Question 2

Primary Articulation of the wrist:

Answer 2

-Radiocarpal Joint

Question 3

2 parts of the distal forearm:

Answer 3

1. styloid process of radius / ulna

2. distal radius

Question 4

distal forearm - angled how many degrees and toward what?

Answer 4

25* toward ulna (medial)

Question 5

the ulnar tilt allows for what?

Answer 5

greater ulnar deviation

Question 6

radial deviation is limited by

Answer 6

styloid process of radius

Question 7

radial deviation is known as what?

Answer 7

abduction

Question 8

ulnar deviation is known as what?

Answer 8

adduction

Question 9

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

which bones are they?

Answer 9

relatively loose fashion

Question 10

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

which bones are they?

Answer 10

tightly by strong ligaments

Question 11

what does the distal row provide?

Answer 11

rigid and stable base for articulations wth MCs

Question 12

the transverse carpal ligament connects what bones?

Answer 12

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

Question 13

What does the Carpal Tunnel prevent?

Answer 13

Prevents “bowstringing”

Question 14

passageway of carpal tunnel is for what?

Answer 14

for median nerve and extrinsic finger flexor tendons

Question 15

how many finger flexors in carpal tunnel

Answer 15

8 finger flexor tendons

Question 16

Intercarpal Joints - what kind of movements occur?

Answer 16

small gliding movements

Question 17

what are the proximal components of radoiocarpal joint?

Answer 17

-concave radius and adjacent articular disc

Question 18

what are the Distal components of radoiocarpal joint?

Answer 18

• convex proximal surfaces of scaphoid and lunate

- triquetrum

Question 19

what does TFCC stand for?

Answer 19

triangular fibrocartilage complex

Question 20

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

Answer 20

2*

Question 21

wrist motion - axes pass through which bone?

Answer 21

capitate

Question 22

Wrist ROM: flexion

Answer 22

0 to 70-85*

Question 23

Wrist ROM: Extension

Answer 23

0 to 60-75⁰

Question 24

Wrist ROM: Deviations

Answer 24

• Ulnar: 0 to 35-40⁰

- Radial: 0 to 15-20⁰

Question 25

when Falling on Outstretched Hand - what is the injury?

Answer 25

colles fracture

Question 26

colles fractured fractures what?

Answer 26

Scaphoid Fracture

Question 27

wrist extensors - proximal attachment is where?

Answer 27

on or near lateral epicondyle

Question 28

what is the role of the wrist extensors?

Answer 28

being able to make a fist

Question 29

degrees of extension / deviation of wrist extensors?

Answer 29

30-35* wrist extension | and 5* ulnar deviation

Question 30

Grip strength reduced with what kind of movement?

Answer 30

wrist flexion (shortened finger flexors)

Question 31

wrist flexors proximal attachment on or near

Answer 31

on or near Medial Epicondyle

Question 32

HAND has how many bones, articulations, and muscles?

Answer 32

19 bones 19 articulations 29 muscles

Question 33

arthrology: Finger Movements:

Answer 33

1. Flexion/Extension (sagittal) | 2. Abduction/Adduction (frontal) middle finger is reference

Question 34

arthrology: Thumb Movements: • Opposition describes what?

Answer 34

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

Question 35

arthrology: Thumb Movements: • Reposition describes what?

Answer 35

from full opposition back to anatomic position

Question 36

what type of joints are the Carpometacarpal (CMC) Joints

Answer 36

synovial joint

Question 37

Carpometacarpal (CMC) Joints have what kind of movement?

Answer 37

sliding and gliding

Question 38

Carpometacarpal (CMC) Joints are surrounded by what?

Answer 38

by joint capsules and multiple ligaments

Question 39

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

Answer 39

sagittal plane

Question 40

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

Answer 40

the frontal plane

Question 41

the Carpometacarpal is what type of joint?

Answer 41

saddle joint -- biaxial, which allows for opposition

Question 42

the Carpometacarpal is a loose capsule which allows for what?

Answer 42

great ROM

Question 43

CMC: what is opposition?

Answer 43

Composite of other primary motions

Question 44

Metacarpophalangeal Joints are which digits #?

Answer 44

Digits 2-5

Question 45

Metacarpophalangeal Joints: flexion and extension occur in what plane?

Answer 45

sagittal

Question 46

Metacarpophalangeal Joints: Abduction/Adduction occur in what plane?

Answer 46

frontal

Question 47

MetacarpophalangealJoint (Thumb) is what type of joint?

Answer 47

hinge joint for flexion/extension

Question 48

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

Answer 48

hinge joints for flexion / extension | sagittal