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Anatomy > muscle orgins and actions > Flashcards

muscle orgins and actions Flashcards

1
Q

what is the action of the masseter

A

the major muscle that elevates the mandible

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2
Q

what is the attachment point of the masseter

A

the zygomatic bone/ arch

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3
Q

what is the action of the temporalis

A

elevate the mandible

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4
Q

what is the attachment point of the temporalis

A

the temporal fossa

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5
Q

what is the action of the frontalis

A

raise eyebrows an wrinkle forehead

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6
Q

what is the attachment point of the frontalis

A

the frontal bone, epicardial aponeurosis

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7
Q

what is the action of the orbicularis oculi

A

blink, squint, close your eyes

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8
Q

what is the attachment point of the orbicularis oculi

A

tissue around the eyes

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9
Q

what is the action of the orbicularis oris

A

pucker lips, kissing muscle

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10
Q

what is the attachment point if the orbicularis oris

A

tissue around the mouth

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11
Q

what is the action of the sternocleidomastoid

A

when using 1 muscle: ipsilateal contraction and rotation (contract left: left flexion, right rotation)
whn using 2 muscles: neck flexion (looking down)

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12
Q

what is the attachment point of the sternocleidomastoid

A

insertion is the mastoid process of the temporal bone

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13
Q

what is the action of the pectoralis major

A

adduction of the arm

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14
Q

what is the attachment point of the pectoralis major

A

intertubercular socius (groove)

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15
Q

what is the action of the rectus abdominis

A

flex the trunk

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16
Q

what is the attachmnet point of the rectus abdominis

A

pubic symphysis of the xiphoid process

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17
Q

what is the action of the external oblique

A

unilateral conraction: lipsilateral flextion or rotation
contraction of both: flexion of the trunk

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18
Q

what is the attachment point of the external oblique

A

the ribs

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19
Q

what is the action of the trapezuis

A

shrugging your shoulders, neck extension

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20
Q

what is the attachment point of the trapezius

A

the spine of the scapula

21
Q

what is the action of the latissimus dorsi

A

arm extension at shoulder joint (push arm back)

22
Q

what is the attachment point of the latissimus dorsi

A

posterior muscle attached to intertubercular socius (groove)

23
Q

what is the action of the deltoid

A

main arm abduction (pshing arm out to the side)

24
Q

what is the attachment point of the deltoid

A

deltoid tuberosity of diaphysis of humerus

25
Q

what is the action of the erector spinae

A

straighten the back

26
Q

what is the attachment point of the erector spinae

A

transverse process of vertebrae

27
Q

what is the action of the biceps brachii

A

flex the arm at elbow joint

28
Q

what is the attachmnet point of biceps brachii

A

radial tuberosity

29
Q

what is the action of the triceps brachii

A

extends the arm at the elbow

30
Q

what is the insertion of the triceps brachii

A

olecranon fossa

31
Q

what is the action of the pronator teres

A

pronate the arms (palms face forward/ down)

32
Q

what is the attachment point of the pronator teres

A

origin on medial side and insertion on lateral side

33
Q

what is the action of the supinator

A

supinate the arms (palms facing down/ back)

34
Q

what is the attchment point of the supinator

A

origin on lateral side and insertion on medial side

35
Q

what is the action of the gluteus maximus

A

extension of the leg at the hip

36
Q

what is the attachment point of the gleuteus maximus

A

gluteal tuberosity on proximal end of femur

37
Q

what is the action of the hamstring muscles

A

extend the leg at hip and cause flexion of knee bone

38
Q

what is the attachment point of the hamstring muscles

A

ischial tuberosity of ischium

39
Q

what is the action of the adductor muscles

A

adduct the leg (bring it towards middle)

40
Q

what is the attachment point of the adductor muscles

A

Linea aspera

41
Q

what is the action of the sartorius

A

allows you to sit with legs crossed

42
Q

what is the attachmnet point of the sartorius

A

anterior supirior iliac spine

43
Q

what is the action of the quadriceps femoris

A

flex leg at him and extend leg atknee (kick forward)

44
Q

what is the attachment point of the quadriceps femoris

A

tendon that lays over the patella

45
Q

what is the action of the gastrocnemius

A

plantar flexion (stand on tippy toes)

46
Q

what is the attachment point of the gastrocnemius

A

achelous tendoes attaced to calcaneus

47
Q

what is the action of the tibialis anterior

A

pull toes up

48
Q

what is the attachment point of the tibialis anterior

A

tarsal and metatarsal bones

Anatomy (13 decks)

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