Lecture 7 - Muscles of the Upper Extremity and Shoulder

Question 1

attaches muscle to bone

Answer 1

tendon

Question 2

attaches bone to bone

Answer 2

ligament

Question 3

body tissue consisting of long cells that contract when stimulated and produce motion

Answer 3

muscle

Question 4

origin of a muscle

Answer 4

attachment of muscle that is generally the anchor, remains stationary

Question 5

insertion of a muscle

Answer 5

attachment of a muscle that generally moves and goes closer to the origin when contracted

Question 6

action of a muscle

Answer 6

describes the movement of a body region at a joint

Question 7

leader and major responsibility for movement (also known as agonist)

Answer 7

leader / prime mover

Question 8

against the leader, relax so opposite muscle can do its job

Answer 8

antagonist

Question 9

main muscle that does an action (also known as prime mover)

Answer 9

agonist

Question 10

works together, helps prime mover by adding or reducing force

Answer 10

synergist

Question 11

holds a bone firmly in place

Answer 11

fixators

Question 12

what are the SITS muscles?

Answer 12

supraspinatus
infraspinatus
teres minor
supscapularis

Question 13

what is the rotator cuff?

Answer 13

group of muscles and tendons that surround the shoulder joint that keeps head of humerus in the socket

Question 14

what are the intrinsic muscles of the hand?

Answer 14

• thenar (thumb)
• hypothenar (little finger)
• interossei
• lumbrical

Question 15

what is the thenar eminence?

Answer 15

• fleshy part at the base of thumb
• 3 muscles

Question 16

what is the hypothenar eminence?

Answer 16

• fleshy part at base of fifth digit (small finger)
• 4 muscles

Question 17

the articulation of distal aspect of metacarpals with proximal aspect of phalanges is called….

Answer 17

metacarpophalangeal joints

Question 18

what is the anatomical snuff box?

Answer 18

• aka radial fossa
• triangular depression found on posterior, lateral side of the wrist and metacarpal (near thumb)

Question 19

the muscle that forms a rectangular bridge over the carpal bones on palmar side is called….

Answer 19

the flexor retinaculum

Question 20

what is the function of the flexor retinaculum

Answer 20

forms the roof of the carpal tunnel which covers the tendons of flexor muscles and the median nerve

Question 21

4 intrinsic muscles of the hand

Answer 21

• thenar
• hypothenar
• interossei
• lumbrical

Question 22

what does intrinsic hand muscles mean?

Answer 22

intrinsic muscles of the hand contain the origin and insertions within the carpal and metacarpal bones