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Flashcards in Quiz 1 Muscles Deck (12)
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Masseter OIAN

O: Zygomatic arch

I: mandible and lateral surface of coronoid process

A: elevate mandible. Protrude mandible.

N: V3

1

Temporalis OIAN

O: Temporal fossa

I: coronoid process & Ramus of mandible

A: elevate mandible. Retract mandible.

N: deep temporal nerve V3.

2

SCM OIAN

O: sternal head - manubrium.
Clavicular head - medial 1/3 of
clavicle

I: mastoid process. Superior nuchal line occiput

A: UL contraction. IL flexion. CL rotation. BL flex/extend head.

N: motor = XI. Sensory = C2, C3.

3

Scalenes OIAN.
Anterior

O: anterior tubercle of C3-C6 TPs.

I: 1st rib

A: elevate R1

N: lower cervical central rami

4

Scalenes OIAN
POSTERIOR

O: posterior tubercles of C4-C6 TPs

I: external border R2

A: elevate R2. Flex and rotates neck

N: lower cervical ventral rami.

5

Scalenes OIAN

MIDDLE

O: posterior tubercle of C2-C7 TPs.

I: 1st rib

A: elevate R1

N: lower cervical ventral rami.

6

Levator scapulae OIAN

O: TPs of C1-C4

I: superior portion of medial border of scapula

A: elevate superior angle of scapula and draws it medially. Rotates scapula = glenoid cavity tilts inferior. Bends neck laterally and rotates neck to same side.

N: dorsal scapular nerve C5 (lower fibers). And C3, C4 (upper fibers)

7

Trapezius OIAN

O: EOP. Medial 1/3 sup nuchal line. Nuchal lig. SPs C7-T12

I: lateral 1/3 clavicle. Acromion. Scapular spine.

A: rotate scapula for ABD. Upper fibers= elevate shoulder. Middle fibers= retract shoulder. Lower fibers= draw scapula down.

N: motor = XI. Proprio = C3,C4.

8

Rhomboid major OIAN

O: SPs T2-5

I: medial border of scapula.

A: retract scapula. Rotate to depress glenoid cavity. Fix scapula to thoracic wall

N: dorsal scapular nerve. C4 C5

9

Rhomboid minor OIAN.

O: nuchal lig. SPs C7-T1

I: same as major

A: same as major

N: same as major.

10

Splenius capitis OIAN

O: nuchal lig. SPs C6-C7

I: mastoid process. Lateral 1/3 sup nuchal line.

A: Acting BL extend head/neck. Acting UL - lateral flex to side of contraction.

N: dorsal rami of middle cervical spinal nerves.

11

Splenius cervicis. OIAN

O: nuchal lig. SPs C6-C7

I: posterior tubercles of TPs C1-C3
A: Acting BL extend head/neck. Acting UL - lateral flex to side of contraction.

N: dorsal rami of middle cervical spinal nerves.