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Anatomy > Deep posterior neck musculature > Flashcards

Deep posterior neck musculature Flashcards

1
Q

List the 3 muscles that contribute to the suboccipital triangle

A
  1. Rectus capitis posterior major
  2. Obliquus capitis superior
  3. Obliquus capitis inferior
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2
Q

muscles of the deep posterior neck are innervated by which nerve

A

the suboccipital (C1) spinal nerve of the posterior ramus innervates the deep posterior neck muscles

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3
Q

Identify the muscle

A

Rectus Capitis Posterior Minor

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4
Q

Origin:
Insertion:
Action:
Innervation:

A

Rectus Capitis Posterior Minor

Origin: Posterior tubercle of C1 (Atlas)

Insertion: Medial part of the inferior nuchal line of the occipital bone

Action: Rotates the head to the same side (ipsilateral) at the atlanto-axial joint

Innervation: Suboccipital nerve (C1 dorsal ramus)

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5
Q

Rectus Capitis Posterior Minor action

A

ipsilateral rotation of the Atlanta-axial joint

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6
Q

Rectus Capitis Posterior Minor Innervation:

A

Suboccipital nerve (C1 dorsal ramus)

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7
Q

Identify the muscle

A

Rectus Capitis Posterior Major

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8
Q

Origin:
Insertion:
Action:
Innervation:

A

Rectus Capitis Posterior Major

Origin: Spinous process of C2 (Axis)

Insertion: Lateral part of the inferior nuchal line of the occipital bone

Action:
o Extends the head atlanto-occipital joint
o Rotates the head to the same side (ipsilateral) at the atlanto-axial joint

Innervation: Suboccipital nerve (C1 dorsal ramus)

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9
Q

Rectus Capitis Posterior Major action

A

Action:
o Extends the head atlanto-occipital joint
o Rotates the head to the same side (ipsilateral) at the atlanto-axial joint

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10
Q

Rectus Capitis Posterior Major innervation

A

Innervation: Suboccipital nerve (C1 dorsal ramus)

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11
Q

Identify the muscle

A

Obliquus Capitis Superior

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12
Q

Origin:
Insertion:
Action:
Innervation:

A

Obliquus Capitis Superior

Origin: Transverse process of C1 (Atlas)

Insertion: Occipital bone between superior and inferior nuchal lines

Action: (ipsilateral) Laterally flexes the neck & Extends the head at the atlanto-occipital joint

Innervation: Suboccipital nerve (C1 dorsal ramus)

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13
Q

Obliquus Capitis Superior action

A

Action: Laterally flexes the neck to the same side (ipsilateral) & Extends the head at the atlanto-occipital joint

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14
Q

Obliquus Capitis Superior innervation

A

Innervation: Suboccipital nerve (C1 dorsal ramus)

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15
Q

Identify the muscle

A

Oliquus Capitis Inferior

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16
Q

Origin:
Insertion:
Action:
Innervation:

A

Oliquus Capitis Inferior

Origin: Spinous process of C2 (Axis)

Insertion: Transverse process of C1 (Atlas)

Action: Rotates the head to the same side atlanto-axial joint

Innervation: Suboccipital nerve (C1 dorsal ramus)

17
Q

Oliquus Capitis Inferior action

A

Action: Rotates the head to the same side atlanto-axial joint

18
Q

Oliquus Capitis Inferior innervation

A

Innervation: Suboccipital nerve (C1 dorsal ramus)

19
Q

Muscles that extend the neck at the Atlanto-occipital joint

A
  1. rectus capitis major
  2. rectus capitis minor
  3. Obliquus capitis superior
20
Q

Muscles that cause lateral flexion (3) of the neck

A
  1. Obliquus capitis superior
  2. Splenius capitis
  3. longissimus capitis
21
Q

Muscles that cause ipsilateral rotation of the head

A
  1. Obliquus capitis inferior
  2. Rectus capitis posterior major + minor
  3. Longissimus capitis
  4. Splenius capitis
22
Q

Muscles that cause contralateral rotation of the head

A
  1. SCM
  2. Semispinalis capitis
23
Q

List the 3 muscles that form the sub occipital triangle

A
  1. Rectus capitis posterior major (super-medial)
  2. Obliquus capitis inferior (superolateral)
  3. Obliquus capitis inferior (inferolateral)
24
Q

What is located in the sub occipital triangle?

A
  1. Vertebral artery
  2. sub-occipital nerve (C1)
25
Q

Vertebral Artery:
1. branch of the _____ artery
2. travels in the ______ foramen of C__ to C__
3. Passes superiorly through the foramen _______

A

Vertebral Artery:
1. branch of the subclavian artery
2. travels in the transverse foramen of C1 to C6
3. Passes superiorly through the foramen magnum

26
Q

Prolonged head turning may reduce blood flow to the ______ artery (brain), causing light-headedness, dizziness, etc.

A

Prolonged head turning may reduce blood flow to the vertebral artery (brain), causing light-headedness, dizziness, etc.

27
Q

Identify surface anatomy of back:

28
Q

Identify muscles in triangle of auscultation

A
  1. Trapezius (superomedial)
  2. inferior border of rhomboid major (lateral)
  3. Latissimus dorsi (inferior)
29
Q

Triangle of auscultation function:

A

thinning of muscle is an optimal space to listen to lungs

Anatomy (10 decks)

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