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BIOD 151 > Lab 5: Muscular System- Axial Muscles > Flashcards

Lab 5: Muscular System- Axial Muscles Flashcards

1
Q

What are the types of muscles?

A
  1. Cardiac
  2. Smooth
  3. Skeletal
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2
Q

What are the 5 main functions of the muscular system?

A
  1. Movement
  2. Stability/Support
  3. Protection
  4. Heat generation
  5. Blood circulation
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3
Q

What is the origin of the Frontalis muscle?

A
  • Corrugator supercilii muscle
  • Orbicularis oculi fascia
  • Procerus muscle
  • Zygomatic process of the frontal bone
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4
Q

What is the action of the Frontalis muscle?

A

Raise eyebrows

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5
Q

What is the innervation of the Frontalis muscle?

A

Facial nerve (CN VII)

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6
Q

What is the action of the Occipitalis muscle?

A

Draws the scalp posteriorly

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7
Q

What is the innervation of the Occipitalis muscle?

A

Facial nerves (CN VII)

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8
Q

What is the action of the Orbicularis Oculi muscle?

A

Eye closure

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9
Q

What is the innervation of the Orbicularis Oculi muscle?

A

Facial nerve (CN VII)

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10
Q

What is the action of the Orbicularis Oris muscle?

A
  • closes lips
  • protrudes lips forward
  • presses lips against teeth (important for phonation)
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11
Q

What is the innervation of the Orbicularis Oris muscle?

A

Facial nerve (CN VII), buccal branch

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12
Q

What is the action of the Zygomaticus Major muscle?

A

Pull corners of lips upward and laterally (creates a smile)

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13
Q

What is the innervation of the Zygomaticus Major muscle?

A

Facial nerve (CN VII), zygomatic branch

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14
Q

What is the action of the Depressor Labii Inferioris muscle?

A
  • Pulls the lips downward
  • Chewing
  • Creates expression of doubt
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15
Q

What is the innervation of the Depressor Labii Inferioris muscle?

A

Facial nerve (CN VII), mandibular branch

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16
Q

What is the action of the Levator Labii Superioris muscle?

A

Elevate the lips

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17
Q

What is the innervation of the Levator Labii Superioris muscle?

A

Facial nerve (CN VII), buccal branch

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18
Q

What is the action of the Buccinator muscle?

A

Compress cheeks

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19
Q

What is the innervation of the Buccinator muscle?

A

Facial nerve (CN VII), buccal branch

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20
Q

What is the action of the Mentalis muscle?

A
  • Elevate and protrude the lower lips
  • Wrinkles the skin over the chin
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21
Q

What is the innervation of the Mentalis muscle?

A

Facial nerve (CN VII)

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22
Q

What is the action of the Platysma muscle?

A

Draw the lower lip downward, angle of the mouth downward, expression of horror or surprise

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23
Q

What is the innervation of the Platysma muscle?

A

Facial nerve (CN VII)

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24
Q

What is the action of the Styloglossus muscle?

A

Draws the tongue upward and posteriorly; chewing and swallowing; speech

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25
Q

What is the innervation of the Styloglossus muscle?

A

Hypoglossal Nerve (CN XII)

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26
Q

What is the action of the Hyoglossus muscle?

A

Pulls tongue down during swallowing

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27
Q

What is the innervation of the Hyoglossus muscle?

A

Hypoglossal Nerve (CN XII)

28
Q

What is the action of the Temporalis muscle?

A

Elevates and retracts the mandible, closes jaw

29
Q

What is the innervation of the Temporalis muscle?

A

Trigeminal nerve (CN V, mandibular branch)

30
Q

What is the action of the Masseter muscle?

A

Jaw closure; elevate mandible; lateral/medial, protraction/retraction of the mandible; chewing

31
Q

What is the innervation of the Masseter muscle?

A

Trigeminal nerve (CN V, mandibular branch)

32
Q

What is the origin of the Sternocleidomastoid muscle?

A
  • Sternal end of clavicle
  • Sternum (manubrium)
33
Q

What is the action of the Sternocleidomastoid muscle?

A

Bilateral: neck flexion; Unilateral: turns face to opposite side (contralateral rotation)

34
Q

What is the innervation of the Sternocleidomastoid muscle?

A

Accessory nerve (CN XI)

35
Q

What is the action of the Stylohyoid muscle?

A

Elevate/retract hyoid bone; swallowing

36
Q

What is the innervation of the Stylohyoid muscle?

A

Facial nerve (CN VII)

37
Q

What is the action of the Sternohyoid muscle?

A

Depress the hyoid bone

38
Q

What is the innervation of the Sternohyoid muscle?

A

Cervical plexus

39
Q

What is the action of the Sternothyroid muscle?

A

Depress the larynx

40
Q

What is the action of the Anterior/Middle/Posterior Scalenes?

A

Elevates ribs 1 & 2; unilateral: ipsilateral flexion of the neck, contralateral rotation; bilateral: neck flexion, accessory breathing muscles

41
Q

What is the innervation of the Anterior/Middle/Posterior Scalenes?

A

Cervical spinal nerves (C03-C08)

42
Q

What is the action of the External Abdominal Oblique muscle?

A

Unilateral: contralateral rotation
Bilateral:
- stabilize vertebral column during lifting
- maintain posture
- support internal viscera
- aid in forceful expiration

43
Q

What is the innervation of the External Abdominal Oblique muscle?

A

Thoracic Spinal Nerves (T07-T12)

44
Q

What is the action of the Internal Abdominal Oblique muscle?

A

Unilateral: ipsilateral rotation
Bilateral:
- stabilize vertebral column during lifting
- maintain posture
- support internal viscera
- aid in forceful expiration

45
Q

What is the innervation of the Internal Abdominal Oblique muscle?

A

Thoracic Spinal Nerves (T07-T12)

46
Q

What is the action of the Transverse Abdominis muscle?

A

Compresses internal abdominal viscera

47
Q

What is the innervation of the Transverse Abdominis muscle?

A

Dorsal Ramus of Spinal Nerve (T07 - L01)

48
Q

What is the action of the Rectus Abdominis muscle?

A

Lumbar flexion

49
Q

What is the innervation of the Rectus Abdominis muscle?

A

Dorsal Ramus of Spinal nerve (T06 - T12)

50
Q

What is the action of the Diaphragm?

A

Quiet inspiration, brings in 2/3 of inspired air, expands thoracic cavity, compresses abdominal cavity

51
Q

What is the innervation of the Diaphragm?

A

Phrenic nerve (C3-5)

52
Q

What is the action of the External Intercostals?

A

Assist in quiet inspiration, elevates ribs (normal inspiration)

53
Q

What is the innervation of the External Intercostals?

A

Intercostal nerves

54
Q

What is the action of the Internal Intercostals?

A

Depresses/retracts ribs (forced expiration)

55
Q

What is the innervation of the Internal Intercostals?

A

Intercostal nerves

56
Q

What is the action of the Superior Rectus muscle?

A

Move the eye up

57
Q

What is the innervation of the Superior Rectus muscle?

A

Oculomotor Nerve

58
Q

What is the action of the Inferior Rectus muscle?

A

Move the eye down

59
Q

What is the innervation of the Inferior Rectus muscle?

A

Oculomotor Nerve

60
Q

What is the action of the Medial Rectus muscle?

A

Move the eye medially (in)

61
Q

What is the innervation of the Medial Rectus muscle?

A

Oculomotor Nerve

62
Q

What is the action of the Lateral Rectus muscle?

A

Move the eye laterally (out)

63
Q

What is the innervation of the Lateral Rectus muscle?

A

Abducens Nerve

64
Q

What is the action of the Superior Oblique muscle?

A

Slight depression of eye

65
Q

What is the innervation of the Superior Oblique muscle?

A

Trochlear Nerve

66
Q

What is the action of the Inferior Oblique muscle?

A

Slight elevation of eye

67
Q

What is the innervation of the Inferior Oblique muscle?

A

Oculomotor Nerve

BIOD 151 (17 decks)

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