Biomechanics Midterm

Front 1

scapulohumeral rythym involves ___ of the scapula and ___ of the humerus

Back 1

upward rotation / abduction

Front 2

what is the purpose of scapula muscles

Back 2

to stabilize and move the scapula

Front 3

which is not a rotator cuff muscle

Back 3

teres major

Front 4

which is true about the rotator cuff muscles

Back 4

they work together to hold the head of the humerus in the glenoid fossa

Front 5

what secretes synovial fluid to lessen friction between soft tissues around joints

Back 5

bursae

Front 6

glenohumeral dislocations occur when

Back 6

the humerus is abducted and externally rotated

Front 7

which scapula muscles perofrm as stabilizers during crutch walking

Back 7

depressors

Front 8

which scapula muscles perform as stabilisers during pushups

Back 8

abductors

Front 9

what can promote the development of rotator cuff impingement syndrome

Back 9

throwing swiming tennis serving

Front 10

biceps brachii is strongest and most effectivve as an elbow flexor when the forearm is in what position

Back 10

supinated

Front 11

the brachialis strongest effective elboew flexor

Back 11

IN any position

Front 12

to best isolate the brachialis perform arm cirls with forearm in what position

Back 12

pronated

Front 13

ecarpometacarpal joint 1 is what type of joint

Back 13

saddle

Front 14

interphalangeal joints are what type of joints

Back 14

hinge

Front 15

metacarpal phalangela joints 2 3 4 5 are what type of joint

Back 15

condyloid

Front 16

overuse of wrist extensors can cause

Back 16

tennis elbow, lateral epicondylitis, tendinitis

Front 17

muscles associated with little league elbow

Back 17

wrist flexors

Front 18

muscles on the anterior side of the arm produce flextion at what joints

Back 18

shoulder elbow wrist

Front 19

what provides stability at the elbow

Back 19

articulating bones and ligaments

Front 20

pronation and supination of the forearm occur at what joints

Back 20

proximal and distal radioulnar

Front 21

which tyes of movement are permittedat the radiocarpal joint

Back 21

saggital plane, circumduction, frontal plane motion

Front 22

movement of the hand at the wrist toward the thumb side of the arm (frontal plane) is known as what

Back 22

radial deviation

Front 23

the large reange ofmotion at the thumb compared to fingers is derived from structure of

Back 23

thumbs carpometacarpal joint

Front 24

unique behavioral property of muscle

Back 24

ability to develop tension

Front 25

where is the series elastic component of amuscle found

Back 25

tendon

Front 26

the elasticity of human skeletal muscle tissue is mostly due to

Back 26

series elastic component

Front 27

motor unit

Back 27

single motor neuron and all muscle fibers it innervates

Front 28

penneate muscles

Back 28

more tension less range of motion

Front 29

parallel muscles

Back 29

less tension more range of motoin

Front 30

when movement is slow

Back 30

slow twitch muscle fibers are recruited first

Front 31

type of muscle contraction employed by elbow flexors when slowly lowering backpack to desk

Back 31

eccentric

Front 32

contraction with no length change

Back 32

isometric

Front 33

down phase of knee extension excersize what role hamstring

Back 33

antagonist

Front 34

type of muscle tension used as a bracking muchanism

Back 34

eccentric

Front 35

biceps crachii finction as antagonist

Back 35

straighten elbow during pushup

Front 36

electromechanical delay

Back 36

time required to initiate development of tension after nerve impulse

Front 37

force velocity relationship fro muscles

Back 37

contraction is slower ehn the load isheavior

Front 38

rate of torque production at a joint

Back 38

muscular power