Superficial Neck Flashcards

1
Q

Cranial Nerves that carry parasympathetic fibers

A

III

VII

IX

X

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2
Q

Foramens in Cervical Vertebrae

A
  1. Vertebral foramen (spinal cord)
  2. Transverse foramen (vertebral artery)
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3
Q

Vertebral artery

A
  • Vascularizes spinal cord and brain
  • branch of subclavian artery
  • enters foramen magnum at atlas
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4
Q

Atlanto Occipital Joint

A
  • Condyloid Synovial joint
  • between superior articular facet of atlas and **occipital condyle **
  • ****allows “yes” movement
  • Jefferson Fracture - compression in cervical region
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5
Q

Atlanto-Axial Joint

A
  • “No” movment
  • 3 Synovial joints:
    • (1) between Dens and Anterior arch - Pivot
    • (2) between opposing articulations - gliding joint
  • Hangman’s Fractures - quadraplegia if spinal cord injured
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6
Q

Larynx

A
  • Phonating mechanism
  • gaurds and maintains patent airway
  • between C4-C6
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7
Q

3 Cartilages of Larynx (cranial to caudal)

A
  1. Epiglottic cartilage
  2. Thyroid cartilage
  3. Cricoid cartilage
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8
Q

Hyoid Bone

A
  • from 2nd/3rd pharyngeal arches
  • opposite C3/C4
  • no articulations, just attachment for **hyoid muscles **
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9
Q

Hyoid Muscles

A
  • Suprahyoid and Infrahyoid groups
  • Functions
    • Swallowing
    • Accessory Chewing
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10
Q

Suprahyoid Muscles

A
  1. Mylohyoid
  2. Digastric Muscle
  3. Stylohyoid Muscle
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11
Q

Mylohyoid Muscle

A
  • Floor of mouth
  • Innervation - CN V3
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12
Q

Digastric Muscle

A
  1. Anterior Belly - attached to mandible
    1. Innervation - CN V3
  2. Posterior Belly - attached to mastoid process
    1. Innervation - CN VII
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13
Q

Stylohyoid

A
  • attached to styloid process and **hyoid bone **
  • Innervation - CN VII
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14
Q

Trigeminal Nerve

A
  • 5th Cranial nerve (CN V)

has 3 major branches V1, V2, V3

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15
Q

Infrahyoid Muscles

A
  1. Sternohyoid
  2. Sternothyroid
  3. Thyrohyoid
  4. Omohyoid (superior/inferior bellies)
  • all EXCEPT Thyrohyoid innervated by ansa cervicalis (motor part of cervical plexus)
  • Thyrohyoid innervated by C1
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16
Q

Cervical Plexus

A
  • ****made from ventral rami C1-C4 spinal nerves
  • sensory (Cutaneous) and motor (Ansa cervicalis)
17
Q

Ansa Cervicalis

A
  • unity of superior (C1) and inferior (C2 & C3) roots
  • motor innervation to infrahyoid muscles
18
Q

Sensory part of Cervical Plexus

A
  • Cutaneous to neck/shoulder
  • Exit behind Sternocleidomastoid
  1. Lesser Occipital (C2)
  2. Greater auricular (C2&C3)
  3. Transverse cervical (C2&C3)
  4. Supraclavicular nerves (C3&C4)
19
Q

Strernocleidomastoid muscle (SCM)

A
  • Function: Flexes neck (bilaterally); turns face to opposite side (unilaterally)
  • Innervation: Spinal accessory nerve (CN XI)
  • divides neck into anterior and posterior triangles
20
Q

Cervical Fascia

A
  1. **Superficial Cervical Fascia **
    1. has platysma muscle (shaving muscle)
    2. innervated by CN VII
  2. Deep Cervical Fascia
    1. Investing Layer
      1. Surrounds Trapezius & **SCM **
    2. Prevertebral Layer
      1. extends sideways as axillary sheath
    3. Pretracheal Layer
      1. Muscular layer - surrounds infrahyoids
      2. Visceral layer - surrounds thyroid, trachea, **esophagus **
21
Q

Carotid Sheath contains

A
  1. Common Carotid Artery
  2. Internal Jugular Vein (IJV)
  3. Vagus Nerve (CN X)
22
Q

Investing Layer

A
23
Q

Pretracheal Layer

A
24
Q

Prevertebral Layer

A
25
Q

Cervical Triangles

A
  1. Anterior Triangle
  2. Posterior Triangle
26
Q

Anterior Triangles

A
  1. Submandibular Triangle
  2. Submental Triangle
  3. Muscular Triangle
  4. Carotid Triangle
27
Q

Submandibular Triangle

A
  • Submandibular gland
  • Facial artery & vein
28
Q

Muscular Triangle

A
  • Infrahyoid muscle
  • part of anterior jugular vein
29
Q

Carotid Triangle

A
  • Carotid sheath (IJV, CN X, Common Carotid artery)
  • Ansa Cervicalis
  • Hypoglossal nerve
30
Q

Bifurcations of the Common Carotid Artery

A
  • Internal and External carotids
  • External branches into
    • Superior thyroid artery
    • Lingual artery
    • Facial artery
31
Q

Posterior Triangle Contents

A
  • Sensory branch of cervical plexus (Erb’s point)
  • External jugular vein
  • Spinal accessory nerve
  • Root of brachial plexus
32
Q

Spinal Accessory Nerve

A
  • C1-C5
  • exits skull via jugular foramen
  • travels w/ vagus nerve
  • innervates with SOMATIC MOTOR FIBERS
    • SCM
    • Trapezius
  • Traverses posterior triangle
33
Q
A