Flashcards in Chapter 9 (Deep Structures [Root] of Neck) Deck (14)
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1
Q
(Anterior Vertebral Muscles) Longus colli (Innervation and action)
A
- Innervation: Anterior rami C2-C6 spinal nerves
- Action: Flexes neck with rotation (torsion) to opposite side if action unilaterally
2
Q
(Anterior Vertebral Muscles) Longus capitis (innervation and action)
A
- Innervation: Anterior rami of C1-C3 spinal nerves
- Action: Flex head
3
Q
(Anterior Vertebral Muscles)
Rectus capitis anterior (innervation and action)
A
- Innervation: Branches form loop between C1 and C2 spinal nerves
- Action: flex head
4
Q
(Anterior Vertebral Muscles) Anterior scalene (innervation and action)
A
- Innervation: Cervical spinal nerves C4-C6
- Action: flex head
5
Q
(Lateral Vertebral Muscles)
Rectus capitis lateralis (innervation and action)
A
- Innervation: Branches form loop between C1 and C2 spinal nerves
- Action: Felxes head and helps stabilize it
6
Q
(Lateral Vertebral Muscles) Splenius capitis (innervation and action)
A
- Innervation: Posterior rami of middle cervical spinal nerves
- Action: Laterally flexes and rotates head and neck to same side; extends head and neck
7
Q
(Lateral Vertebral Muscles) Levator scapulae (Innervation and action)
A
- Innervation: Dorsal scapular nerve C5 and cervical spinal nerves C3 and C4
- Action: Downward rotation of scapula and tilts its glenoid cavity inferiorly by rotating scapula
8
Q
(Lateral Vertebral Muscles) Middle scale (innervation and action)
A
- Innervation: anterior rami of cervical spinal nerves
- Action: Flexes neck laterally; elevates 1st rib during forced inspiration
9
Q
(Lateral Vertebral Muscles) Posterior scalene (innervation and action)
A
- Innervation: Anterior rami of cervical spinal nerves C7 and C8
- Action: Flexes neck laterally; elevates 2nd rib during forced inspiration
10
Q
(Neurovascular Structures)
Key arteries include:
A
- Brachiocephalic trunk
- Subclavian arteries (right and left) and branches
11
Q
(Neurovascular Structures)
Subclavian arteries and branches:
A
- 1st part: vertebral artery, internal thoracic artery, and thyrocervical trunk
- 2nd part: costocervical trunk
- 3rd part: dorsal scapular artery
12
Q
(Neurovascular Structures)
Nerves in the root of neck:
A
- Vagus nerve (CN X)
- Phrenic nerves
- Sympathetic trunks
13
Q
(Neurovascular Structures)
Key veins include:
A
- External jugular vein
- Anterior jugular vein
- Subclavian vein
14
Q
(Neurovascular Structures)
Lesion of the cervical sympathetic trunks may produce…
A
- Contraction of the pupil (miosis)
- Drooping of the superior eyelid (ptosis)
- Sinking in of the eye, and/or vasodialation/absence of sweat on the face and neck (anhydrosis)