Excel Spreadsheet Muscles Flashcards

1
Q

MUSCLES THAT MOVE THE MANDIBLE

A

Masseter
Temporalis
Lateral Pterygoid
Medial Pterygoid

all innervated by trigeminal

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2
Q

Masseter

A

elevates the mandible (biting)

innervated by trigeminal

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3
Q

Temporalis

A

retracts the mandible and assist with elevating the mandible (biting)

innervated by trigeminal

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4
Q

Lateral Pterygoid

A

protracts and depresses the mandible (opens the jaw)

innervated by trigeminal

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5
Q

Medial Pterygoid

A

protracts and elevates the mandible (closes the jaw)

innervated by trigeminal

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6
Q

MUSCLES THAT MOVE THE TONGUE

A

Genioglossus
Styloglossus
Palatoglossus
Hyoglossus

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7
Q

Occipitofrontalis

A

Origin: “Occipital belly: occipital bone
Frontal belly: galea aponeurotica”

INS: “Occipital belly: galea aponeurotica
Frontal belly: fascia and skin superior to eye and nose”

overall, elevates (raises) eyebrows and wrinkles skin of forehead horizontally as in look of surprise

facial nerve (CN VII): temporal branch

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8
Q

Zygomaticus major

A

Origin: zygomatic bone

INS: skin at angle of mouth and orbicularis oris

draws angle of mouth superiorly and laterally, as in smiling

facial nerve (CN VII): zygomatic branch and buccal branch

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9
Q

Zygomaticus minor

A

Origin: zygomatic bone

Insertion: upper lip

raises (elevates) upper lip, exposing maxillary teeth

facial nerve (CN VII): zygomatic branch and buccal branch

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10
Q

Levator labii superioris

A

Origin: n/a

Insertion: skin at angle of mouth and orbicularis oris

raises (elevates) upper lip

facial nerve (CN VII): zygomatic branch

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11
Q

Depressor labii inferioris

A

Origin: n/a

Insertion: skin of lower lip

depresses (lowers) lower lip

facial nerve (CN VII): marginal mandibular branch

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12
Q

Depressor anguli oris

A

Insertion: n/a

Origin: angle of the mouth

draws angle of mouth laterally and inferiorly

facial nerve (CN VII): marginal mandibular branch

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13
Q

Orbicularis oris

A

Origin: muscle fibers surrounding the opening of the mouth

Insertion: skin at the corner of the mouth

closes and protrudes the lips; compresses lips against teeth; shapes lips during speech

facial nerve (CN VII): buccal branch

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14
Q

Buccinator

A

Origin: n/a

Insertion: orbicularis oris

presses cheeks against teeth and lips, as in whistling, blowing, sucking; draws corner of mouth laterally; assists in mastication (chewing) by keeping food between the teeth

facial nerve (CN VII): buccal branch

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15
Q

Risorius

A

Origin: N/A

Insertion: skin at the angle of the mouth

draws angle of the mouth laterally, as in grimacing

facial nerve (CN VII): buccal branch

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16
Q

Mentalis

A

Origin: n/a

Insertion: skin of chin

elevates and protrudes the lower lip and pulls up skin of chin, as in pouting

facial nerve (CN VII): marginal mandibular branch

17
Q

Platysma (muscle of neck and facial expression)

A

Origin: n/a

Insertion: mandible, muscle around angle of mouth, and skin of lower face

draws outer part of lower lip inferiorly and posteriorly as in pouting; depresses mandible

facial nerve (CN VII): cervical branch

18
Q

Orbicularis oculi

A

Origin: n/a

Insertion: circular path around orbit

closes and squints eye (orbital part), depresses upper eyelid and elevates lower eyelid

facial nerve (CN VII): temporal branch and zygomatic branch

19
Q

Corrugator supercilii

A

Origin: n/a

Insertion: skin of eyebrow

draws eyebrow inferiorly and medially, wrinkles skin of forehead vertically as in frowning

facial nerve (CN VII): temporal branch

20
Q

Sternocleidomastoid muscle

A

Origin: sternum and clavicle

Insertion: mastoid process of the temporal bone

“contraction of both flexes the cervical vertebrae & extends head (thrust chin forward, keeping head level)
contraction of one, laterally flexes the neck and rotates face in opposite direction”

cranial nerve XI (spinal accessory)

21
Q

Trapezius

A

cranial nerve XI (spinal accessory)

22
Q

Rectus capitis posterior, both major and minor

A

mainly postural muscles, causing some combination of flexion, extension, lateral bending, and/or rotation at the atlanto-occipital and atlanto-axial joints

23
Q

Obliquus capitis, both inferior and superior

A

mainly postural muscles, causing some combination of flexion, extension, lateral bending, and/or rotation at the atlanto-occipital and atlanto-axial joints

24
Q

Suprahyoid muscles?

A

Digastric
Stylohyoid
Mylohyoid
Geniohyoid

25
Digastric Stylohyoid Mylohyoid Geniohyoid
Suprahyoid muscles that elevate the hyoid bone, floor of the oral cavity, and tongue during swallowing
26
Infrahyoid muscles
Omohyoid Sternohyoid Sternothyroid Thyrohyoid
27
Omohyoid Sternohyoid Sternothyroid Thyrohyoid
infrahyoid muscles depress the hyoid bone, and some move the larynx during swallowing and speech
28
Scalenes
Origin: Attach cervical vertebrae to uppermost ribs Inisertion: Attach cervical vertebrae to uppermost ribs Flex, laterally flex & rotate the head Participate in forced inspiration cervical spinal nerves C3 – C8
29
External intercostal muscles
Origin: inferior border of rib above (travels obliquely-from lateral to medial) Insertion: superior border of the rib below (travels obliquely-from lateral to medial) Elevates the rib cage (muscle of inspiration)
30
Internal intercostal muscles
Origin: superior border of a rib below (fibers angle up and in at right angle to external intercostals) Insertion: inferior border of the rib above (fibers angle up and in at right angle to external intercostals) Action: Depress the rib cage, which is important in forced expiration
31
Transverse thoracic muscles
Origin: sternum Insertion: cartilages of ribs 2 - 6 Depresses the ribs
32
Subcostal muscles
Origin: bridge two intercostal spaces probably elevate the ribs, making them muscles of inspiration
33
Innermost intercostal muscles
Origin: bridge an intercostal space probably muscles of expiration