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Human Anatomy & Physiology > Lab 7 - Axial Muscles > Flashcards

Lab 7 - Axial Muscles Flashcards

1
Q

Action and attachment of occipitofrontalis (frontal belly):

A

Action: Elevates eyebrows, wrinkles forehead
Attachments: Galea aponeurotica

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2
Q

Action and attachment of orbicularis oculi:

A

Action: Blinking, aids flow of tears
Attachments: Lacrimal bone, frontal bone, and maxilla

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3
Q

Action and attachment of corrugator supercilii:

A

Action: Draws eyebrows medially and downward
Attachments: Medial end of supraorbital margin

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4
Q

Action and attachment of nasalis:

A

Action: Widens nostrils
Attachments: Maxilla

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5
Q

Action and attachment of orbicularis oris:

A

Action: Closes and protrudes lips
Attachments: Modiolus, maxilla, and mandible

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6
Q

Action and attachment of levator labii superioris:

A

Action: Elevates and everts upper lip
Attachments: Zygomatic bone, maxilla

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7
Q

Action and attachment of levator anguli oris:

A

Action: Smiling
Attachments: Maxilla

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8
Q

Action and attachment of zygomaticus major:

A

Action: Draws angle of mouth upward and laterally
Attachment: Zygomatic bone

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9
Q

Action and attachment of zygomaticus minor:

A

Action: Elevates upper lip and exposes upper teeth
Attachments: Zygomatic bone

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10
Q

Action and attachment of risorius:

A

Action: Draws angle of mouth laterally
Attachments: Zygomatic arch

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11
Q

Action and attachment of depressor anguli oris:

A

Action: Draws angle of mouth laterally and downward (frowning)
Attachments: Inferior margin of mandibular body

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12
Q

Action and attachment of buccinator:

A

Action: Compresses cheek
Attachments: Alveolar process of mandible and maxilla

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13
Q

Action and attachment of mentalis:

A

Action: Elevates and protrudes lower lip
Attachments: Mandible

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14
Q

Action and attachment of platysma:

A

Action: Draws lower lip and angle of mouth downward
Attachments: Mandible and clavicle

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15
Q

Action and attachment of external oblique:

A

Action: Supports abdominal viscera, stabilizes vertebral column
Attachment: Ribs 5-11, anterior half of iliac crest

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16
Q

Action and attachment of internal oblique:

A

Action: Supports abdominal viscera, stabilizes vertebral column
Attachment: Ribs 10-12, iliac crest

17
Q

Action and attachment of transverse abdominal:

A

Action: Compresses abdominal contents
Attachments: Costal cartilages 7-12, iliac crest

18
Q

Action and attachment of rectus abdominis:

A

Action: Flexes waist
Attachments: Pubic symphysis, xiphoid process, costal cartilages 5-7

19
Q

Action and attachment of temporalis:

A

Action: Elevation, retraction, lateral and medial excursion of the mandible
Attachments: Coronoid process (mandible), and mandibular ramus

20
Q

Action and attachment of masseter:

A

Action: Elevation of the mandible, chewing
Attachments: Zygomatic arch, mandibular ramus, and mandibular angle

21
Q

Action and attachment of sternocleidomastoid:

A

Action: Lifts head slightly upwards and from left to right
Attachments: Manubrium, clavicle, mastoid process

22
Q

Action and attachment of digastric:

A

Action: Depresses mandible when hyoid is fixed, opens mouth widely
Attachments: Mastoid process (skull), hyoid

23
Q

Action and attachment of sternohyoid:

A

Action: Depresses hyoid after it has been elevated
Attachments: Ansa cervicalis, hyoid, manubrium (sternum), medial end of the clavicle

24
Q

Action and attachment of thyrohyoid:

A

Action: Depresses hyoid, elevates larynx, singing high notes
Attachment: Hyoid

25
Q

Action and attachment of sternothyroid:

A

Action: Depresses larynx, signing low notes
Attachment: Manubrium, costal cartilage

26
Q

Action and attachment of diaphragm:

A

Action: Prime mover of respiration
Attachment: Xiphoid process, ribs, and costal cartilage

27
Q

Action and attachment of external intercostals:

A

Action: Elevates and protracts ribs 2-12
Attachment: Inferior margin of ribs 1-11

28
Q

Action and attachment of internal intercostals:

A

Action: Compressing thoracic cavity
Attachment: Superior margin of ribs 2-12

29
Q

What nerve innervates the diaphragm?

A

Phrenic nerve

30
Q

What nerve innervates the temporalis and masseter muscles?

A

Trigeminal nerve

Human Anatomy & Physiology (9 decks)

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