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MASTER MUSCLES > Head > Flashcards

Head Flashcards

1
Q

Occipitalis

A

Origin:
Lateral 2/3 of the superior nuchal line of the occipital bone
Mastoid process of the temporal bone

Insertion:
Galea Aponeurotica

Action:
Draws the scalp posteriorly
Elevation of the eyebrows

Nerve:
Facial nerve

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2
Q

Frontalis

A

Origin:
Galea Aponeurotica

Insertion:
Fascia and skin overlying the front bone

Action:
Draws the scalp anterior
Elevation of the eyebrows

Nerve: Facial nerve

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3
Q

Temporoparietalis

A

Origin:
Temporal fossa fascia superior to the ear

Insertion:
Lateral border of the galea aponeurotica

Action:
Elevation of the ear
Tightens the scalp

Nerve:
Facial nerve (CN VII)

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4
Q

Zygomaticus Major

A

origin:
Zygomatic bone near the zygomaticotemporal suture

Insertion:
modiolus - just lateral to the angle of the mouth

Action:
Elevation of the angle of the mouth
Draws the angle of the mouth laterally

Nerve:
Facial nerve

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5
Q

Zygomaticus Minor

A

Origin:
Zygomatic bone near the zygomaticomaxillary suture

Insertion:
Muscular substance of the upper lip

Action:
Elevates the upper lip
Everts the upper lip (curling the upper lip away from the face)

Nerve:
Facial nerve (CN VII)

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6
Q

Buccinator

A

Origin:
External surface of the alveolar processes of the maxilla and mandible
Pterygomandibular raphe

Insertion:
Deep musculature of the lips
Modiolus - just lateral to the angle of the mouth

Action:
Compresses the cheeks against the teeth

Nerve:
Facial nerve

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7
Q

Risorius

A

Origin:
Facia and skin superficial to the masseter

Insertion:
Angle of the mouth (the modiolus)

Action:
Retracts angle of the mouth (draws laterally the angle of the mouth)

Nerve:
Facial nerve

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8
Q

Orbicularis Oculi

A

Origin:
Medial side of the eye

Insertion:
Medial side of the eye (returns to the same attachment)

Action:
Orbital part:
Closes and squints the eye
Palpebral part:
Depresses the upper eyelid and elevates the lower eyelid
Lacrimal part:
Retraction of the lower eye lid
Assists in tear transport and drainage

nerve:
Facial nerve

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9
Q

Orbicularis Oris

A

Origin:
surrounds the mouth; L and R upper and lower parts

Insertion:
Each part anchors to the modiolus
Interlace to opposite side of the upper lip and lower lip

Action:
Closes the mouth
Protracts the lips

Nerve:
Facial nerve

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10
Q

Temporalis

A

origin:
temporal fossa (except the portion of the zygomatic bone)

Insertion:
Coronoid process of the mandible
Anterior border of the ramus of the mandible

Action:
Elevation of the mandible @ TMJ
Retracts the mandible @ TMJ

nerve:
trigeminal nerve (CN V) - mandibular branch

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11
Q

Masseter

A

Origin:
inferior surface of zygomatic arch of the temporal bone
inferior margin of zygomatic bone

Insertion:
coronoid process, angle, and ramus of the mandible

Action:
elevation of the mandible @ TMJ
protraction of the mandible @ TMJ
retraction of the mandible @ TMJ (not primary)

Nerve:
trigeminal nerve - mandibular branch

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12
Q

Medial Pterygoid

A

Origin:
Superficial head:
Palatine bone
Maxilla
Deep Head:
Medial surface of the lateral pterygoid plate of the sphenoid bone
Palatine bone
Tuberosity of the maxilla

Insertion:
Angle and inferior border of the ramus of the internal surface of the mandible

Action:
elevation of the mandible @ TMJ
protraction of the mandible @ TMJ
contralateral deviation of the mandible @ TMJ

Nerve:
trigeminal n - mandibular branch

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13
Q

Lateral pterygoid

A

Origin:
superior head:
greater wing of the sphenoid
inferior head:
lateral surface of the lateral pterygoid plate of the pterygoid process of the sphenoid

insertion:
superior head:
capsule and articular disc of the TMJ
Inferior head:
neck of the mandible

action:
protraction of the mandible @ TMJ
contralateral deviation of the mandible @ TMJ

nerve:
trigeminal n - mandibular branch

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14
Q

Digastric

A

Origin:
Posterior belly:
mastoid notch of the temporal bone
Anterior belly:
Inner surface of the inferior border of the mandible

Insertion:
posterior and anterior belly
central tendon is bound to the body and greater cornu of the hyoid bone

action:
depression of the mandible @ TMJ
retraction of the mandible @ TMJ
flexion of the head & neck @ spinal joints

nerve:
anterior belly:
trigeminal n - mandibular branch
posterior belly:
facial n

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15
Q

Mylohyoid

A

origin:
mylohyoid line of the mandible (from the symphysis menti to the molars) inner surface of the mandible

insertion:
anterior surface of the body of the hyoid

action:
depression of the mandible @ TMJ
flexion of the head & neck @ spinal joints
elevation of the hyoid bone

nerve:
trigeminal n - mandibular branch

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16
Q

Geniohyoid

A

origin:
inferior mental spine of the inner surface of the mandible

insertion:
anterior surface of the body of the hyoid

action:
depression of the mandible @ TMJ
flexion of the head & neck @ spinal joint

nerve:
hypoglossal n

17
Q

stylohyoid

A

origin:
posterior surface of the styloid process of the temporal bone

insertion:
junction of the body and greater cornu of the hyoid bone

action:
elevation of the hyoid bone

nerve:
facial n - stylohyoid branch

18
Q

sternohyoid

A

origin:
posterior surface of the manubrium of the sternum
medial clavicle

insertion:
inferior surface of the body of the hyoid

action:
depression of the hyoid bone
flexion of the neck + head @ spinal joints

nerve:
cervical plexus (ansa cervicalis C1, C3)

19
Q

sternothyroid

A

origin:
posterior surface of the manubrium of the sternum

insertion
lamina of the thyroid cartilage

action:
depression of the thyroid cartilage
flexion of the head & neck @ spinal joints

nerve:
cervical plexus (ansa cervicalis C1, C3)

20
Q

thyrohyoid

A

origin:
lamina of the thyroid cartilage

insertion:
inferior surface of the greater cornu of the hyoid

action:
depression of the hyoid bone
flexion of the neck & head @ spinal joint

nerve:
hypoglossal n - branch of C1 through the hypoglossal n

21
Q

omohyoid

A

origin:
inferior belly:
superior border of the scapula
superior belly:
central tendon is bound to the clavicle

insertion:
inferior belly:
central tendon is bound to the clavicle
superior belly:
inferior surface of the body of the hyoid

action:
depression of the hyoid bone
flexion of the neck & head @ spinal joints

nerve:
cervical plexus (ansa cervicalis C1, C3)

MASTER MUSCLES (4 decks)

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