ANAT30007 Lecture Notes - Lecture 5: Cervical Vertebrae, Internal Jugular Vein, Cricoid Cartilage
5 May 2018
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Department
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Professor
Bony framework of neck
7 cervical vertebrae
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Organised into typical & atypical vertebrae
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Consists of:
Neck regions
Back of neck/vertebral region
1.
Posterior triangle
2.
Sternomastoid region
3.
Posterior
Anterior triangle
4.
Root of neck
5.
Anterior
2.2 Cervical Spine and Neck
Sunday, 8 March 2015
10:39 pm
Locomotor Page 1
Common carotid+internal jugular vein
Hard palate - C1
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Open mouth - C1/2
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Mandible - C2/3
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Hyoid bone - C3
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Upper borer thyroid cartilage - C4
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Cricoid cartilage - C6
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Useful Surface landmarks
Transverse foraminae: transmit vertebral artery (which communicates with internal carotid
system)
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Bifid spinous processes: increases surface area for muscle/ligamentous attachment
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Articular surfaces oriented at 45 degrees
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C7 (atypical) has longest spinous process (vertebra prominens) and is not bifid
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Typical cervical vertebrae
Locomotor Page 2
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Vertebral column commonly shows variations that reflect developmental changes
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Occur at transitional regions
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Variations of (cervical) vertebral column
1% of population may present with cervical rib of varying length - long
rib can compress subclavian artery or lower part of brachial plexus,
particularly nerve roots of C8/T1 (i.e. ulnar nerve)
Anterior and posterior arches
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Saucer-shaped upper surfaces for occipital condyles
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Long transverse process
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Facet for dens
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Atlas C1
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Dens (odontoid process) - developmental body of C1 that has migrated to C2
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Surfaces on dens for articulation with anterior arch of atlas, allows rotation of head
(pivot joint)
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Axis C2
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Atypical cervical vertebrae
Locomotor Page 3
Document Summary
Transverse foraminae: transmit vertebral artery (which communicates with internal carotid system) Bifid spinous processes: increases surface area for muscle/ligamentous attachment. C7 (atypical) has longest spinous process (vertebra prominens) and is not bifid. Vertebral column commonly shows variations that reflect developmental changes. 1% of population may present with cervical rib of varying length - long rib can compress subclavian artery or lower part of brachial plexus, particularly nerve roots of c8/t1 (i. e. ulnar nerve) Dens (odontoid process) - developmental body of c1 that has migrated to c2. Surfaces on dens for articulation with anterior arch of atlas, allows rotation of head (pivot joint) Thick iv discs with central nucleus; help from cervical lordosis. Act in same way as lumbar discs (can also prolapse) Uncinate processes ("uncovertebral joint" - "of luschka") form on superior margins of body - guide movement in fixed plane (flexion, extension, tilting of head to side)
