PE 4 (Muscles) Flashcards

1
Q

Frontalis

A

Action: Raises eyebrows

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2
Q

Temporalis

A

Action: Closes jaw

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3
Q

Occipitalis

A

Action: Pulls scalp posteriorly

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4
Q

Orbicularis Oculi

A

Action: Closes eye, blinking, squinting

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5
Q

Orbicularis Oris

A

Action: Closes lips

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6
Q

Trapezius*

A

Action: Stabilizes, raises, retracts, rotates scapula

Origin: Occipital bone, C7, Thoracic vertebrae

Insertion: Scapula, Clavicle

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7
Q

Masseter*

A

Action: Prime mover of jaw closure

Origin: Zygomatic bone

Insertion: Mandible

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8
Q

Zygomaticus (Major)

A

Action: Raises lateral corners of mouth (smiling)

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9
Q

Sternocleidomastoid*

A

Action: Flexes and laterally rotates the head

Origin: Manubrium (sternum) and clavicle

Insertion: Mastoid process of temporal bone, Occipital bone

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10
Q

Pectoralis Major*

A

Action: Prime mover of arm flexion

Origin: Sternal end of clavicle, sternum

Insertion: Greater tubercle of humerus

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11
Q

Pectoralis Minor*

A

Action: Draws scapula forward and down

Origin: Anterior surfaces of ribs

Insertion: Scapula

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12
Q

Latissimus Dorsi*

A

Action: Prime mover of arm extension

Origin: Thoracic vertebra, Ribs, Iliac crest, (inferior angle of) Scapula

Insertion: Humerus

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13
Q

Serratus anterior*

A

Action: Rotates scapula so inferior angle moves up

Origin: Ribs

Insertion: Vertebral border of scapula

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14
Q

Trapezius*

A

Action: Stabilizes, raises, retracts, rotates scapula

Origin: Occipital bone, C7, Thoracic vertebrae

Insertion: Scapula, Clavicle

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15
Q

Teres Major*

A

Action: Extends, medially rotates, adducts humerus

Origin: Inferior angle of scapula

Insertion: Lesser tubercle of humerus

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16
Q

Infraspinatus

A

Action: Rotates humerus laterally

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17
Q

Rhomboid Major

A

Action: Stabilizes scapula

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18
Q

Rectus abdominis*

A

Action: Flex and rotate lumbar vertebral column

Origin: Pubic crest

Insertion: Xiphoid process, Ribs

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19
Q

External oblique

A

Action: Flex vertebral column and compress abdominal wall

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20
Q

Deltoid*

A

Action: Prime mover of arm abduction

Origin: Clavicle, Acromiom, Spine of scapula

Insertion: Humerus

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21
Q

Supraspinatus*

A

Action: Initiates abduction, stabilizes shoulder joint

Origin: Supraspinous fossa of scapula

Insertion: Greater tubercle of humerus

22
Q

Infraspinatus*

A

Action: Rotates humerus laterally

Origin: Infraspinous fossa of scapula

Insertion: Greater tubercle of humerus

23
Q

Teres minor*

A

Action: Rotates humerus laterally

Origin: Scapula

Insertion: Greater tubercle of humerus

24
Q

Subscapularis*

A

Action: Prime medial rotator of the humerus

Origin: Subscapular fossa of the scapula

Insertion: Lesser tubercle of humerus

25
Q

Triceps brachii*

A

Action: Powerful forearm extensor

Origin: Scapula, Humerus

Insertion: Olecranon of ulna

26
Q

Biceps brachii*

A

Action: Flexes elbow and supinates forearm

Origin: Coracoid process, Glenoid cavity, Humerus

Insertion: Radial tuberosity

27
Q

Brachialis

A

Action: Major forearm flexor

28
Q

Brachioradialis

A

Action: Synergist in flexing forearm

29
Q

Flexor carpi radialis

A

Action: Powerful flexor of wrist, abducts hand

30
Q

Extensor carpi radialis longus

A

Action: Extends and abducts wrist

31
Q

Tensor Fascia Latae

A

Action: Steadies the knee and trunk on thigh

32
Q

Rectus Femoris*

A

Action: Extends knee and flexes thigh at hip

Origin: Iliac spine, Acetabulum

Insertion: Tibial tuberosity

33
Q

Vastus Lateralis*

A

Action: Extends and stabilizes knee

Origin: Greater trochanter

Insertion: Tibial tuberosity

34
Q

Vastus Medialis*

A

Action: Extends knee

Origin: Femur

Insertion: Tibial tuberosity

35
Q

Sartorius*

A

Action: Flexes, abducts, and laterally rotates thigh

Origin: Iliac spine

Insertion: Tibia

36
Q

Gracilis

A

Action: Adducts thigh, flexes and medially rotates leg

37
Q

Adductor Longus

A

Action: Adducts, flexes, and medially rotates thigh

38
Q

Gluteus Maximus*

A

Action: Major extensor of thigh

Origin: Ilium, sacrum, coccyx

Insertion: Femur

39
Q

Gluteus Medius

A

Action: Abducts and medially rotates thigh

40
Q

Adductor Magnus

A

Action: Adducts, flexes, and medially rotates thigh, extends thigh

41
Q

Semimembranosus*

A

Action: Extends thigh and flexes knee

Origin: Ischial tuberosity

Insertion: Medial condyle of tibia,
Lateral condyle of femur

42
Q

Semitendinosus*

A

Action: Extends thigh and flexes knee

Origin: Ischial tuberosity

Insertion: Tibia

43
Q

Biceps Femoris*

A

Action: Extends thigh and flexes knee

Origin: Ischial tuberosity, femur

Insertion: Head of fibula,
Lateral condyle of tibia

44
Q

Gastrocnemius*

A

Action: Plantar flexes foot

Origin: Medial and lateral condyles of femur

Insertion: Calcaneus

45
Q

Soleus*

A

Action: Plantar flexes foot

Origin: Tibia, Fibula

Insertion: Calcaneus

46
Q

Fibularis Longus

A

Action: Plantar flexes foot

47
Q

Fibularis Brevis

A

Action: Plantar flexes foot

48
Q

Tibialis Anterior*

A

Action: Prime mover of dorsiflexion

Origin: Lateral condyle of tibia

Insertion: Metatarsal

49
Q

Flexor Digitorum Longus

A

Action: Plantar flexes and inverts foot, flexes toes

50
Q

Extensor Digitorum Longus

A

Action: Prime mover of toe extension