Anatomy Division 3 Flashcards
path of vertebral arteries (before and after)
subclavian a. –> vertebral a. –> basilar a.
path of carotid arteries (before and after)
subclavian a. –> common carotid a. –> internal and external carotid aa.
arteries of the circle of wilis anterior to posterior
anterior cerebral anterior communicating internal carotid middle cerebral posterior communicating posterior cerebral basilar vertebral
CN pathways out of the skull
-Cribriform plate: CN I
-Optic canal: CN II, ophthalmic a
-Jugular foramen: Internal jugular v, CN IX, X, XI
-Superior orbital fissure
CN V1, III, IV, VI
-Foramen rotundum: CN V2
-Foramen ovale: CN V3
-Foramen spinosum: Middle meningeal a
-Hypoglossal canal: CN XII
-Foramen magnum: Spinal cord, vertebral aa
spinal ligaments anterior to posterior
- anterior longitudinal ligament
- posterior longitudinal ligament
- ligamentum flavum
- interspinous ligaments
- nuchal ligament
- supraspinous ligament
Atlanto-occipital joint motion
yes joint
atlanto-axial joint motion
no joint
cruciate ligament spans levels…
OC-C2
alar ligament prevents
excessive rotation
transverse ligament of the atlas spans
crosses over the dens of the axis
cervical enlargement levels
C4-T1
lumbosacral enlargement
L1-S3
conus medullaris
tapering end of spinal cord
cauda equina
bundle of nerve roots
filum terminale
thin strand of Pia that anchors the conus medullaris
subarachnoid space is a REAL/FALSE space
REAL! filled with CSF
spinal arteries
anterior spinal artery and 2 posterior spinal arteries
spinal veins
3 anterior and 3 posterior veins
levator palpebrae superioris m.
O: lesser wing of sphenoid
I: skin of superior eyelid
A: elevates superior eyelid
I: oculomotor n. (CN3)
superior rectus m.
elevates, adducts, and medially rotates eye
CN3
inferior rectus m.
depresses, adducts, and lateral rotation
CN3
medial rectus m.
adducts eye
CN3
lateral rectus m.
abducts eye
CN6
superior oblique m.
abducts, depresses, medially rotates eye
CN4
inferior oblique m.
abducts, elevates, laterally rotates eye
CN3
intrinsic back muscles are innervated by…
dorsal primary rami
splenius m.
O: nuchal ligament and SP of C7-T6
I: mastoid (splenius capitis) and TP of C1-C4 (splenius cervicis)
A: unilateral ipsilateral neck flexion/rotation and bilateral neck extension