Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A & P I > 11 Muscle > Flashcards

11 Muscle Flashcards

1
Q

Frontal belly of occipitofrontalis

A

raises eyebows and wrinkles forehead

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Orbicularis oculi

A

Sphincter muscle around eye, closes eye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Orbicularis oris

A

Sphincter muscle around mouth, closes lips, protrudes lips as in kissing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Zygomaticus major

A

Raises corners of mouth and upper lip posteriorly and superiorly (as in smiling)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Mentalis

A

attaches to lower lip, chin muscle, Protrudes lower lip (pout)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Buccinator

A

Cheek muscle, compresses cheek, holds food between teeth while eating. (babies use it for suckling)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Platysma

A

Thin superficial sheet of muscle on neck. Pulls lower lip inferiorly, tenses neck skin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Depressor anguli oris

A

Pulls corner of mouth inferiorly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Temporalis

A

Elevates mandible and pulls posteriorly (retracts)
broad, fan shaped
from temporal line of skull to coronoid process of mandible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Masseter

A

Elevates mandible and pulls anteriorly (retracts) prime mover closing jaw
most powerful and important masticatory muscle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Lateral Pterygoid

A

Side to side movement of mandible, protracts mandible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Medial Pterygoid

A

Elevates and protracts mandible, side to side movement of mandible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Sternocleidomastoid

A

extends from sternum and clavicle to mastoid process
If one muscle contracts it rotates head to opposite side. If both muscles contract causes head flexion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Scalene

A

anterior, middle and posterior
works with sternocleidomastoid to flex neck
extends from transverse prcess of cervical vertebrae
elevates first and second ribs during forced inhalation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Trapezius

A

Diamond shaped muscle
Extends form the skull and vertebral column to pectoral girdle
Elevates and depresses scapula. Extends head.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Erector spinae group: spinalis

A

Most medial.
nserts on spinous processes of vertebrae
composed of cervical and thoracic parts
If one muscle contracts causes lateral flexion of vertebral column. If both muscles contract causes back extension.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Erector spinae group: longissimus

A

Intermediate of the three.
inserts on vertebrae transverse processes
composed of capitis, cervical, and thoracic parts
If one muscle contracts causes lateral flexion of vertebral column. If both muscles contract causes back extension.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Erector spinae group: iliocostalis

A

Most lateral.
has cervical thoracic and lumbar parts
If one muscle contracts causes lateral flexion of vertebral column. If both muscles contract causes back extension.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

splenius capitis, splenius cervicis, semispinalis, longissimus capitis

A

posterior neck muscles
when contracted bilaterally, extend neck
when contracted unilaterally, turn head and neck to same side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

diaphragm

A

dome-shaped muscle
partitions thoracic and abdominal cavities
most important muscle associated with breathing
fibers conversing toward a fibrous central tendon
contracts during inspiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

External intercostals

A

extends inferomedially from superior rib to adjacent inferior rib
Elevates ribs during inspiration (fibers run inferior and anterior)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Internal intercostals

A

deep to external intercostals, fibers at right angles to external intercostals
Depresses ribs during forced expiration (fibers run inferior and posterior)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

transversus thoracis

A

depresses ribs during forced expiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

External oblique

A

superficial, fibers directed inferomedially
muscular along lateral abdominal wall, forms aponeurosis anteriorly
If one side contracts causes rotation at waist. If both muscles contract causes compression of abdomen (fibers run inferior and medial)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Internal oblique

A

immediately deep to external oblique
fibers projecting superomedially, forms aponeurosis projecting anteriorly
If one side contracts, causes rotation at waist.
If both muscles contract causes compression of abdomen and stabilize vertebral column (fibers run superior and medial) Deep to external oblique.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Transversus abdominis

A

deepest muscle
fibers projecting transversely, forms aponeurosis anteriorly
Compresses abdomen. Deep to internal oblique (fibers run horizontal)

27
Q

Rectus abdominis

A

long muscle extending vertically
partitioned into four segments by fibrous tendinous intersections
enclosed within a fibrous sleeve, rectus sheath (connected by linea alba)
formed from aponeuroses of external and internal oblique, transversus
Flexes vertebral column

28
Q

Linea alba (not a muscle)

A

White line of strong connective tissue at midline from xiphoid process to pubic symphysis.

29
Q

Pectoralis minor

A

Moves scapula anteriorly and down, when contracted shoulders hunch forward
deep to pectoralis major

30
Q

Serratus anterior

A

fans shaped muscle between ribs and scapula
superior rotator of the scapula (e.g., upper limb abduction)
Agonist in scapula protraction, stabilizes scapula.

31
Q

levator scapulae

A

originates from transverses processes of cervical vertebrae
inserts on superior angle of scapula
elevates and inferiorly rotates the scapula

32
Q

rhomboid major and minor

A

deep to the trapezius
runs inferolaterally from vertebrae to scapula
helps elevate, retract, and inferiorly rotate the scapula

33
Q

Pectoralis major

A

thick fan-shaped muscle on superior thorax
prime arm flexor; adducts, medially rotates

34
Q

Latissimus dorsi

A

broad triangular muscle on inferior back
prime arm extensor; adducts, medially rotates

35
Q

Deltoid

A

Prime mover abduction of arm and rotation of arm

36
Q

Subscapularis

A

Stabilize and medial rotates shoulder Rotator Cuff
used when winding up for a pitch

37
Q

Supraspinatus

A

Stabilize and abducts shoulder
Rotator Cuff
used when starting to execute pitch

38
Q

Infraspinatus

A

Stabilize and adducts shoulder Rotator Cuff
slows down arm on completion of pitch
with teres minor

39
Q

Teres minor

A

Stabilize and adducts shoulder Rotator Cuff
slows down arm on completion of pitch
with infraspinatus

40
Q

Brachialis

A

Prime mover forearm flexion
deep to biceps brachii
most powerful flexor of forearm

41
Q

Biceps brachii

A

large two-headed muscle on anterior humerus
one of the two primary flexors of the forearm
supinator of the forearm when elbow flexed
weakly helps flex the humerus
long head originates on supraglenoid tubercle of scapula
assists in flexing the arm

42
Q

Triceps brachii

A

long head originates on infraglenoid tubercle, spans joint
major extensor of the forearm
also helps extend the humerus
helps extend and adduct the arm

43
Q

Brachioradialis

A

Forearm flexion
on anterolateral forearm
synergistic in elbow flexion

44
Q

Flexor carpi radialis

A

Flexes wrist and abducts hand

45
Q

Flexor carpi ulnaris

A

Flexes wrist and adducts hand

46
Q

Flexor digitorum

A

Flexes phalanges

47
Q

Extensor carpi radialis

A

Extends wrist and abducts hand

48
Q

Extensor carpi ulnaris

A

Extends wrist and adducts hand

49
Q

Extensor digitorum

A

Extends phalanges

50
Q

Iliacus (part of Iliopsoas)
Psoas major (part of iliopsoas)

A

anterior thigh
originate on lumbar vertebrae and ilium
merge and insert on femur as iliopsoas
work synergistically to flex the thigh

51
Q

tensor fasciae latae

A

lateral thigh
abducts and medially rotates the thigh
attaches to lateral thickening of fascia lata
termed iliotibial tract

52
Q

adductor brevis, adductor longus, adductor magnus

A

medial thigh
adducts the thigh
brevis and longus also flex the thigh
magnus also extends and laterally rotates the thight

53
Q

Gracilis

A

medial thigh
Adducts and flexes thigh

54
Q

Biceps femoris

A

(part of hamstrings)
Extension of thigh at hip AND flexion of knee
origin on ischial tuberosity

55
Q

Semitendinosus

A

(part of hamstrings)
Extension of thigh at hip AND flexion of knee
origin on ischial tuberosity

56
Q

Semimembranosus

A

(part of hamstrings)
Extension of thigh at hip AND flexion of knee
origin on ischial tuberosity

57
Q

Quadriceps femoris

A

Extend leg at knee
Four heads are
Rectus femoris
Vastus lateralis
Vastus medialis
Vastus intermedius

58
Q

Sartorius

A

Flexes thigh, rotates thigh laterally, flexes leg

59
Q

Extensor digitorum longus

A

Extends toes

60
Q

Gastrocnemius

A

inserts via Achilles tendon/calcaneal tendon on calcaneus
Plantar flexion of foot

61
Q

Soleus

A

Plantar flexion of foot
inserts via Achilles tendon/calcaneal tendon on calcaneus. Deep to Gastrocnemius

62
Q

Tibialis anterior

A

Dorsiflexion of foot

63
Q

gluteus maximus

A

largest of three gluteal muscles
chief extensor of the thigh
laterally rotates the thigh

64
Q

gluteus medius and minimus

A

deep to the gluteus maximus
abducts and medially rotates thigh

A & P I (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions