Neck Flashcards
Describe movements of the head:
flexion, extension, lateral tilt, rotation
How many cervical vertebrae are there?
7
Name of C1? How does it contribute to head rotation?
atlas; moves with the skull
Name of C2? How does it contribute to head rotation?
axis; moves with the neck
Describe vertebral body of C1:
None, anterior tubercle
Describe vertebral arteries in respect to the foramen transversarium.
vertebral arteries bypass C7 as they ascend tin the neck, but pass through C6 to C1 as they ascend to the brain.
Describe spinous process of C1.
None, posterior tubercle
Describe the zygophysial (“facet”) joints of C1:
present, plus atlantooccipital joint
Describe the vertebral body of C2:
odontoid process (dens)
Describe the spinous process of C2:
present, usually bifid
Describe the vertebral body of C3-C7:
present, C7 is “vertebral prominence”
Anterior Longitudinal Ligament, present in other vertebrae? Attachments? Action?
In thoracic and lumbar vertebrae. Attached to anterior surface of the vertebral bodies and anterior tubercle of C1. Attaches superiorly to the base of the occipital bone. Prevent hyperextension of the neck.
Posterior longitudinal ligament, present in other vertebrae? Attachments? Action?
In thoracic and lumbar ligaments. Attaches to posterior surface of the vertebral bodies and odontoid process of C2. Prevent hyperflexion of neck, divert herniation of the nucleus pulposis of intervertebral disks away from spinal cord. Renamed as tectorial membrane at C1 and C2.
What is the tectorial membrane?
It’s the posterior longitudinal ligament renamed at the level of C1 and C2.
Ligamentum Flavum present in other vertebrae? Attachments? Action?
In thoracic and lumbar vertebrae. Attached to lamina. Actions:????? (nothing written in outline)
Interspinous ligaments and Supraspinous ligaments present in other vertebrae? Attachments? Action?
In thoracic and lumbar vertebrae. Interspinous ligaments attach to superior and inferior surfaces of adjacent spinous processes Supraspinous attaches to posterior edge of nuchal ligament. Actions: help nuchal ligament prevent hyperflexion of the neck.
Nuchal Ligament present in other vertebrae? Attachments? Action?
Unique to neck, it is a sheet of connective tissue that connects the edges of the interspinous ligament and supraspinous ligament. Attaches superiorly to base of skull via external occipital crest of occipital bone. Action: prevents hyperflextion of the neck.
Cruciate Ligament present in other vertebrae? Describe it. Attachments? Action?
Unique to C1 and C2 levels of the neck) Cross shaped ligament with superior and inferior longitudinal bands and two transverse ligaments of the atlas http://en.wikipedia.org/wiki/File:Gray307.png Located anterior to the tectorial membrane and posterior to the dens with synovial joint in between. Actions: allows for atlanto axial rotation without damage to spinal cord
Alar Ligament, other name? present in other vertebrae? Attachments? Action?
Check ligament Unique to C1 Attached to medial and lateral sides of odontoid process of the axis and laterally to medial edges of the occipital bone of the foramen magnum. Action: prevent over rotation of the skull.
Function of hyoid bone:
point of attachment for muscles that raise it towards (swallowing, suprahyoid m) and lower away from the epiglottis (respiration, infrahyroid m).
Name the suprahyoid muscles:
mylohyoid, stylohyoid, genohyoid, digastric
Name infrahyoid muscles: What another name for them?
sternohyoid m, omohyoid, sternothyroid, thyrohyoid Strap muscles.
Attachment of mylohyoid:
mylohyoid line of internal mandible -> hyoid bone
Attachment of Stylohyoid
styloid process of temporal bone -> lesser horn of hyoid