L12: Type of synovial joints

Question 1

how many types of synovial joints? what are they?

Answer 1

7:

• plane (gliding)
• spheroid (cotyloid)
• condylar
• ellipsoid
• trochoid
• sellar
• ginglymus (hinge)

Question 2

describe a plane (gliding) joint?

Answer 2

sliding between 2 almost flat surfaces

Question 3

example of plane joint?

Answer 3

សន្លាក់នៅចន្លោះឆ្អឹងកដៃ2

Question 4

t: convexity?

Answer 4

ភាពប៉ោង

Question 5

t: concavity?

Answer 5

ភាពផត

Question 6

what are the other names for spheroid?

Answer 6

cotyloid & ball and socket joint

Question 7

example of spheroid joint?

Answer 7

shoulder & hip joints

Question 8

movement of spheroid joint?

Answer 8

free movement in all directions, including rotation

Question 9

movement of condylar joint?

Answer 9

rotation & abduction-adduction

Question 10

example of condylar joint?

Answer 10

a metacarpo-phalangeal or knuckle joint (រវាងឆ្អឹងបាតដៃ&ឆ្អឹងម្រាមដៃ)

Question 11

តើ ellipsoid joint ស្រដៀងទៅនឹង joint មួយណា?

Answer 11

a condylar joint

Question 12

movement of ellipsoid joint?

Answer 12

flexion, extension, abduction & adduction

Question 13

example of ellipsoid joint?

Answer 13

radiocarpal joint

Question 14

movement of trochoid joint?

Answer 14

rotation

Question 15

example of trochoid joint?

Answer 15

the middle atlantoaxial joint (between the first 2 cervical vertebrae)

Question 16

movement of sellar joint?

Answer 16

• allow flexion-extension less than ball & socket joint
• allow abduction-adduction then ball & socket joint

Question 17

example of sellar joint?

Answer 17

between the trapezium(ឆ្អឹងកដៃផ្នែកមេដៃ), a carpal bone, and the metacarpal of the thumb

Question 18

movement of ginglymus or hinge joint?

Answer 18

flexion & extension

Question 19

example of ginglymus or hinge joint?

Answer 19

between the humerus(ឆ្អឹងកំភួនដៃ) and the ulna
at the elbow

Question 20

what are the mobile joints?

Answer 20

• ball & socket joints
• hinge joints
• pivot joints
• ellipsoidal joints