Anatomy - Occipital Bone
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35 Terms
Spinal Cord
What passes through the foramen magnum?
Cerebellar Tonsils, Arnold Chiari Malformation
What might pathologically pass through the foramen magnum and what is the condition called?
Foramen Magnum
What is shown here?
spinal cord
What structure passes through here?
Condylar Fossa
Name the 2 inferior depressions on the occipital bone (below what is highlighted in green)
Accommodate the superior articular facets of the Atlas (C1)
Purpose of the Condylar Fossa
External Occipital Crest
Name the Inferior Midline Ridge (in the Median Nuchal Line) of the Occipital Bone
External Occipital Crest
Name this feature
Nuchal Ligament
What attaches to the external occipital crest?
Nuchal Lines
What are the 3 pairs of curved transverse ridges from the External Occipital Crest?
Inferior Nuchal Lines
What are the nuchal lines closest to the foramen magnum called?
Superior Nuchal Lines
What are the nuchal lines branching horizontally off the External Occipital Protuberance called?
origin of descending trapezius
What is the purpose of the superior nuchal lines?
Separate the occipital and nuchal planes of the squamous part of the occipital bone
What do the superior nuchal lines separate?
Male
Which sex has more pronounced Superior Nuchal Lines?
Supreme Nuchal Lines
What are the most superior nuchal lines called?
Supreme Nuchal Lines
What are the structures highlighted in Green?
Superior Nuchal Lines
What are the structures highlighted in Blue?
Inferior Nuchal Lines
What is the horizontal structure in pale purple?
occipital protuberance
What is the light purple circular structure?
External Occipital Crest
What is the pink line?
Condylar Fossa
What are the two purple depressions?
Occipital Condyle
What are the pink things at the bottom?
Internal Occipital Crest
Which bony feature separates the right and left cerebellar fossa?
Transverse Sinus Sulci
What are the interior transverse grooves lateral to the internal occipital protuberance?
Transverse Sinus Sulcus
What are these indentations?
Superior Sagittal Sinus Sulcus (portion in the occipital bone)
What groove projects in the midline from the internal occipital protuberance?
Superior Sagittal Sinus Sulcus
What is this groove?
Sigmoid Sinus Sulci
What are the grooves lateral to the foramen magnum
Sigmoid Sinus Sulcus
What are these grooves?
Jugular Tubercles
What are the ridges anterolateral to the foramen magnum?
Clivus
What structure is an extension from the sphenoid bone?
Accommodate the brain stem
What does the clivus do?
Basiocciput
What is this region of the occipital bone?
base of occipital bone
Basiocciput
Note 
Flashcards (20)