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Anatomy Final Exam Content > Exam 4 Muscles > Flashcards

Exam 4 Muscles Flashcards

OIAs and innervations of the fourth exam muscles

1
Q

Sternocleidomastoid

A

O : sternum and medial third of clavicle

I : mastoid process of temporal bone

Action: flexion of head/neck, lateral flexion and rotation of face to opposite side

In : accessory nerve (motor), C2, and C3, (sensory)

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2
Q

Anterior Scalene

A

O : transverse processes of the third and sixth cervical vertebrae

I : first rib

A : fixation or elevation of the first rib during inhalation, with the rib fixed it is lateral flexion of the neck

In : ventral rami of the cervical spinal nerves at the origin of the muscle

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3
Q

Middle Scalene

A

O : transverse processes of the lower five to six cervical vertebrae and possibly the atlas

I : first rib

A : fixation or elevation of the first rib during inhalation, with rib fixed it is lateral flexion of the neck

In : ventral rami of the cervical spinal nerves at the origin of the muscle

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4
Q

Posterior Scalene

A

O : transverse processes of the C5 - C6 cervical vertebrae

I : second rib

A : fixation or elevation of the second rib during inhalation

In : ventral rami of the cervical spinal nerves at the origin of the muscle

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5
Q

Longus Colli

A

O : bodies of C5 - T3 & transverse processes of C5 - C6

I : transverse processes of C5 - C6, anterior surface of atlas, bodies of C2 - C4

A : flexion & possibly lateral flexion of the neck

In : ventral rami of C2 - C6

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6
Q

Longus Capitis

A

O : transverse processes of C3 - C6

I : occipital bone

A : flexion of head & upper cervical vertebrae

In : ventral rami of C1 - C3

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7
Q

Rectus Capitis Anterior

A

O : lateral mass of atlas

I : occipital bone

A : stabilization of the atlanto-occipital joint, flexion of the head

In : ventral rami of C1 - C2

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8
Q

Rectus Capitis Lateralis

A

O : transverse process of atlas

I : occipital bone

A : stabilization of atlanto-occipital joint, lateral flexion of the head

In : ventral rami of C1 - C2

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9
Q

Iliocostalis Cervicis

A

O : upper borders of the upper 6-7 ribs

I : transverse processes of fourth to six cervical vertebrae

A : extension of vertebral column and lateral flexion

In : dorsal rami of spinal nerves

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10
Q

Longissimus Cervicis

A

O : transverse processes of fourth to sixth thoracic vertebrae

I : transverse processes of second to sixth cervical vertebrae

A : extension and lateral flexion of vertebral column

In : dorsal rami of the spinal nerves

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11
Q

Longissimus Capitis

A

O : tendons of Longissimus Cervicis, articular processes of C4 - C7

I : mastoid process of the skull

A : extension / lateral flexion of the vertebral column

In : dorsal rami of the spinal nerves

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12
Q

Spinalis Cervicis

A

O : ligamentum nuchae, spinous processes of C7 - T2

I : spinous processes of C2 - C4

A - extension/lateral flexion of the vertebral column

In : dorsal rami of the spinal nerves

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13
Q

Semispinalis Capitis

A

O : transverse processes of T1 - T7, articular processes of lower C5 - C7

I : occipital bone

A : extension of the head

In : dorsal rami of cervical nerves and thoracic nerves

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14
Q

Semispinalis Cervicis

A

O : transverse processes of upper T1 - T6

I : spinous processes of C2 - C5

A : extension of vertebral column

In : dorsal rami of the cervical and thoracic spinal nerves

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15
Q

Splenius Capitis

A

O : ligamentum nuchae , spinous processes of C7 - T4

I : mastoid process and occipital bone of the skull

A : rotation of head and cervical vertebral column to same side , extension of the head

In : dorsal rami of middle cervical spinal nerves

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16
Q

Splenius Cervicis

A

O : spinous processes of T3 - T6

I : transverse processes of C2 - C5

A : rotation of the head and cervical vertebral column to the same side , extension of the head and vertebral column

In : dorsal rami of lower cervical nerves

17
Q

Obliquus Capitis Inferior

A

O : spinous process of the axis

I : transverse process of the atlas

A : rotation of the atlas (turn head to same side)

In : dorsal ramus of C1

18
Q

Obliquus Capitis Superior

A

O : transverse process of the atlas

I : occipital bone

A : extension and lateral bending of the head

In : dorsal ramus of C1

19
Q

Rectus Capitis Posterior Major

A

O : spinous process of axis

I : occipital bone

A : extension of the head, rotation of the head to the same side

In : dorsal ramus of C1

20
Q

Rectus Capitis Posterior Minor

A

O : posterior tubercle of atlas

I : occipital bone

A : extension of the head

In : dorsal ramus of C1

21
Q

Masseter

A

O : zygomatic arch

I : ramus & angle of mandible

A : elevation of mandible

In : trigeminal nerve

22
Q

Temporalis

A

O : lateral surface of the skull (temporal fossa)

I : coronoid process & anterior part of the ramus of mandible

A : elevation & retraction of mandible

In: trigeminal nerve

23
Q

Lateral Pterygoid

A

O : lateral surface of the lateral pterygoid plate of sphenoid bone & greater wing of the sphenoid bone

I : neck of mandible, capsule & disk of TMJ

A : protraction of mandible

In : trigeminal nerve

24
Q

Medial Pterygoid

A

O : medial surface of the lateral pterygoid plate of the sphenoid bone & maxillary tubercle

I : ramus and angle of mandible

A : elevation of mandible

In : trigeminal nerve

25
Q

Sternohyoid

A

O : sternum (posterior surface)

I : hyoid bone

A : depression/fixation of hyoid bone

In : ventral rami of C1 - C3 via ansa cervicalis

26
Q

Sternothyroid

A

O : sternum (posterior surface)

I : thyroid cartilage

A : depression/fixation of thyroid cartilage

In : ventral rami of C1 - C3 via ansa cervicalis

27
Q

Thyrohyoid

A

O : thyroid cartilage

I : hyoid bone

A : depression/stabilization of hyoid bone *if hyoid bone is fixed, elevation of thyroid cartilage

In : ventral rami of C1 via hypoglossal nerve

28
Q

Omohyoid

A

O : superior border of scapula

I : hyoid bone

A : depression/fixation of hyoid bone

In : ventral rami of C1 - C3 via ansa cervicalis

29
Q

Mylohyoid

A

O : mandible near the molars

I : hyoid bone

A : elevate the hyoid bone, elevate the oral cavity, and depress the mandible

In : trigeminal nerve (mandibular branch)

30
Q

Digastric

A

O : anterior belly - digastric fossa (mandible); posterior belly - mastoid notch of temporal bone

I : hyoid bone

A : swallowing, chewing, and speech

In : posterior belly: facial nerve
anterior belly: trigeminal nerve

31
Q

Platysma

A

O : upper part of the thorax

I : mandible

A : draws corners of mouth and lower lip downward and laterally (horror face)

In : facial nerve

Anatomy Final Exam Content (15 decks)

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