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A&P > Human Muscles > Flashcards

Human Muscles Flashcards

(70 cards)

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1
Q

Sphincter around mouth

A = Closes and protrudes lips

A

Orbicularis oris

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2
Q

Sphincter around eye

A = Closes eyelids

A

Orbiculares oculi

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3
Q

A = Draws angle of mouth laterally as in tenseness

A

Risorius

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4
Q

Raise angle of mouth; smile

A

Zygomaticus

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5
Q

Compress cheek; blowing and sucking

A

Buccinator

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6
Q

Depress mandible; draws lip downward as in pouting; tightens and wrinkles skin of neck

A

Platysma

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7
Q

Raises eyebrows, wrinkles forehead, draws scalp foreword

A

Frontalis

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8
Q

Draws scalp backward

A

Occipitalis

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9
Q

O = Zygomatic arch

I = Ramus of mandible

A = Elevates mandible

A

Masseter

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10
Q

Elevates and retracts mandible

A

Temporalis

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11
Q

Elevates hyoid and larynx, depresses mandible

A

Digastric

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12
Q

O = Sternum and clavicle

I = Mastoid process of temporal bone

A = If both sides contract, it flexes the neck; if one side contracts, it rotates the head towards the opposite side

A

Sternocleidomastoid

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13
Q

Both sides extend head; one side rotates head to the same side as the contracting muscle

A

Spelnius capitus

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14
Q

O = First 9 ribs

I = Vertebral border of scapula, ventral side

A = Abducts scapula

A

Serratus anterior

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15
Q

O = Ribs 3-5

I = Coracoid process of scapula

A = Depresses scapula; protracts scapula

A

Pec minor

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16
Q

Adducts scapula

A

Rombodieus

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17
Q

O = Occipital bone, ligamentum nuchae, spines of C7-T12

I = Clavicle, acromion, and spine of scapula

A = Elevates (upper portion) or depresses (lower portion) scapula; adducts scapula, extends head

A

Trapezius

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18
Q

O = Clavicle, sternum, costal cartilages of ribs 2-6

I = Greater tubercle of humerus

A = Flexes, adducts, and medially rotates arm

A

Pec major

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19
Q

O = Spinous processes of T7 through all lumbar through sacrum, posterior iliac crest, lumbodorsal fascia

I = Intertubercular groove of humerus

A = Extends, adducts and medially rotates arm

A

Lattisimus dorsi\

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20
Q

O = Clavicle, acromion and spine of scapula

I = Deltoid tuberosity of humerus

A = Abducts arm

A

Deltoid

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21
Q

O = Supraspinous fossa

I = Greater tubercle of humerus

A = Abducts arm

A

Supraspinatus

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22
Q

O = Infraspinous fossa

I = Greater tubercle of humerus

A = Rotates arm laterally

A

Infraspinatus

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23
Q

O = Subscapular fossa

I = Lesser tubercle of humerus

A = Rotates arm medially

A

Subscapularis

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24
Q

Medial rotates and adducts arm

A

Teres major

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25
Rotates arm laterally
Teres minor
26
O = Above the glenoid fossa; coracoid process of scapula I = Radial tuberosity A = Flexes forearm (elbow) and supinates forearm
Biceps brachii
27
Flexes forearm
Brachialis
28
O = Long head-below glenoid fossa; Lateral head-lateral and posterior shaft of humerus proximally; Medial head- posterior surface of humerus distally I = Olecranon process of ulna A = Extends forearm (elbow)
Triceps brachii
29
Supinates forearm
Suppinator
30
Pronates forearm
Pronator teres and pronator quadratus
31
O = Medial epicondyle of humerus I = Ventral surface of metacarpals II, III A = Flexes and abducts palm
Flexor carpi radialis
32
Flexes and adducts palm
Flexor carpi ulnaris,
33
Flexes palm
Flexor carpi ulnaris and palmaris longus
34
Flexes phalanges
Flexor digitorum superficialis, flexor digitorum profundis
35
Extends palm
Extensor carpi radialis Extensor carpi ulnaris entensor digitorum
36
Extends and abduct palm
Extensor carpi radialis
37
Extends and adducts palm
Extensor carpi ulnaris
38
Extends phalanges and palm
Extensor digitorum
39
O = Iliac crest, sacrum, coccyx I = Gluteal tuberosity of femur A = Extends thigh (hip joint) and laterally rotates thigh
Gluteus max
40
Muscles that abduct the thigh
Gluteus medius, gluteus min, TFL
41
Abducts and medially rotates thigh
Glut med and min
42
Tenses lateral fascia, flexes thigh (hip) and abducts thigh
TFL
43
O = Pubis I = Linea aspera of femur A = Adducts thigh
Adductor longus
44
Adducts thigh
Adductor longus, magnus, and brevis
45
O = Anterior inferior iliac spine I = Tibial tuberosity via patellar ligament A = Extends leg (knee), flexes thigh (hip)
Rectus femoris
46
O = Greater trochanter and lateral to linea aspera of femur I = Tibial tuberosity via patellar ligament A = Extends leg
Vastus lateralis
47
O = Medial to linea aspera of femur I = Tibial tuberosity via patellar ligament A = Extends leg
Vastus medialis
48
O = Anterior surface of femur I = Tibial tuberosity via patellar ligament A = Extends leg
Vastus medialis
49
Extends leg
Quadriceps femoris
50
Flexes leg
Hamstrings
51
O = Ischial tuberosity and linea aspera I = Lateral condyle of tibia and head of fibula A = Flexes leg (knee), extends thigh (hip)
Bicceps femoris
52
O = Ischial tuberosity I = Medial surface of proximal tibia A = Flexes leg and extends thigh
Ischial tuberosity
53
O = Ischial tuberosity I = Medial condyle of tibia A = Flexes leg and extends thigh
Semimembranosus
54
Flexes leg and adducts thigh
Gracilis
55
Flex thigh and leg, rotate thigh laterally
Sartorius
56
Dorsiflexes foot
Tibialis anterior, extensor digitorum longus
57
O = Lateral condyle of tibia, anterior surface of fibula I = Dorsal surfaces of phalanges 2-5 A = Extends toes, dorsiflexes foot
Extensor digitorum longus
58
Plantar flexes and everts foot
Peroneus longus = Fibularis longus
59
O = Above lateral and medial condyles of femur I = Calcaneus by way of Achilles tendon A = Plantar flexes foot and flexes leg at knee
Plantar flexes foot and flexes leg at knee
60
Plantar flexes foot
Soleus and flexor digitorum longusand gastrocnemius
61
Flexes toes and plantar flexes foot
Flexor digit long
62
O = Lower 8 ribs I = Linea alba and iliac crest A = Compresses abdomen; flexes or bends spine; depresses ribs
Ex ab oblique
63
A = Compresses abdomen, flexes or bends spine; depresses ribs
In ab obl
64
Compresses ab
Trans ab
65
O = Xiphoid process and costal cartilages of ribs 5-7 I = Symphysis pubis A = Compresses abdomen, flexes vertebral column, and depresses ribs
Rectus abdominus
66
Increase size of thoracic cavity
Diaphragm
67
O = One rib I = Next rib A = Breathing [elevates ribs]
Ex intercostals
68
O = One rib I = Next rib A = Breathing [depresses ribs]
In intercostals
69
Extends the vertebral column and bends it laterally
Iliocostalis
70
Muscles that extend the vertebrae
Erector spinae: iliocostalis, longissimus, and spinalis

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