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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. Protection
  3. Heat generation
  4. Blood circulation
  5. Stability/Support
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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/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
What is the innervation of the Styloglossus muscle?
Hypoglossal Nerve (CN XII)
26
What is the action of the Hyoglossus muscle?
Pulls tongue down during swallowing
27
What is the innervation of the Hyoglossus muscle?
Hypoglossal Nerve (CN XII)
28
What is the action of the Temporalis muscle?
- Elevation/retraction of the mandible - closes jaw
29
What is the innervation of the Temporalis muscle?
Trigeminal nerve (CN V, mandibular branch)
30
What is the action of the Masseter muscle?
- Jaw closure - elevate mandible - lateral/medial, protraction/retraction of the mandible - chewing
31
What is the innervation of the Masseter muscle?
Trigeminal nerve (CN V, mandibular branch)
32
What is the origin of the Sternocleidomastoid muscle?
- Sternal end of clavicle - Sternum (manubrium)
33
What is the action of the Sternocleidomastoid muscle?
Bilateral: - neck flexion Unilateral: - turns face to opposite side (contralateral rotation)
34
What is the innervation of the Sternocleidomastoid muscle?
Accessory nerve (CN XI)
35
What is the action of the Stylohyoid muscle?
- Elevate/retract hyoid bone - swallowing
36
What is the innervation of the Stylohyoid muscle?
Facial nerve (CN VII)
37
What is the action of the Sternohyoid muscle?
Depress the hyoid bone
38
What is the innervation of the Sternohyoid muscle?
Cervical plexus (ansa cervicalis)
39
What is the action of the Sternothyroid muscle?
Depress the larynx
40
What is the action of the Anterior/Middle/Posterior Scalenes?
Elevates ribs 1 & 2 unilateral - ipsilateral neck flexion - contralateral rotation bilateral - neck flexion - accessory breathing muscles
41
What is the innervation of the Anterior/Middle/Posterior Scalenes?
Cervical spinal nerves (C03-C08)
42
What is the action of the External Abdominal Oblique muscle?
Unilateral: - contralateral rotation Bilateral: - maintain posture - aid in forceful expiration - support internal viscera - stabilize vertebral column during lifting
43
What is the innervation of the External Abdominal Oblique muscle?
Thoracic Spinal Nerves (T07-T12)
44
What is the action of the Internal Abdominal Oblique muscle?
Unilateral: - ipsilateral rotation Bilateral: - maintain posture - aid in forceful expiration - stabilize vertebral column during lifting - support internal viscera
45
What is the innervation of the Internal Abdominal Oblique muscle?
Thoracic Spinal Nerves (T07-T12)
46
What is the action of the Transverse Abdominis muscle?
Compresses internal abdominal viscera
47
What is the innervation of the Transverse Abdominis muscle?
Dorsal Ramus of Spinal Nerve (T07 - L01)
48
What is the action of the Rectus Abdominis muscle?
Lumbar flexion
49
What is the innervation of the Rectus Abdominis muscle?
Dorsal Ramus of Spinal nerve (T06 - T12)
50
What is the action of the Diaphragm?
- Quiet inspiration - brings in 2/3 of inspired air - expands thoracic cavity (inspiration) - compresses abdominal cavity (expiration)
51
What is the innervation of the Diaphragm?
Phrenic nerve (C3-5)
52
What is the action of the External Intercostals?
Assist in quiet inspiration, elevates ribs (normal inspiration)
53
What is the innervation of the External Intercostals?
Intercostal nerves
54
What is the action of the Internal Intercostals?
Depresses/retracts ribs (forced expiration) - pulls ribs down during expiration - important muscles for singing
55
What is the innervation of the Internal Intercostals?
Intercostal nerves
56
What is the action of the Superior Rectus muscle?
Move the eye up
57
What is the innervation of the Superior Rectus muscle?
Oculomotor Nerve
58
What is the action of the Inferior Rectus muscle?
Move the eye down
59
What is the innervation of the Inferior Rectus muscle?
Oculomotor Nerve (CN III)
60
What is the action of the Medial Rectus muscle?
Move the eye medially (in)
61
What is the innervation of the Medial Rectus muscle?
Oculomotor Nerve (CN III)
62
What is the action of the Lateral Rectus muscle?
Move the eye laterally (out)
63
What is the innervation of the Lateral Rectus muscle?
Abducens Nerve (CN VI)
64
What is the action of the Superior Oblique muscle?
Slight depression of eye
65
What is the innervation of the Superior Oblique muscle?
Trochlear Nerve (CN IV)
66
What is the action of the Inferior Oblique muscle?
Slight elevation of eye
67
What is the innervation of the Inferior Oblique muscle?
Oculomotor Nerve (CN III)

BIOD 151 (24 decks)

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