Exam 2 - Regions of the Vertebral Column (Atypical Cervical) Flashcards
What muscle attaches to the anterior arch of C1?
longus colli
What is the orientation of the superior articular facet of C1?
Backward Upward Medial
BUM
What is the orientation of the inferior articular facet of C1?
Backward Downward Medial
BDM
What muscles attach to the lateral mass of C1?
levator scaupula
splenius cervicis
rectus capitis anterior
What is the distance from the posterior tubercle of the posterior arch to the skin in each gender?
males - about 50mm
females - about 37mm
What attaches to the posterior tubercle of the posterior arch of C1?
rectus capitis posterior minor muscles
ligamentum nuchae
What is the earliest age of development where ossification of the anterior free margin of the posterior atlanto-occipital ligament was observed?
about 7 years old
What names are given to the opening formed by the ponticulus posticus?
arcuate foramen
retroarticular canal
Ponticulus posticus are observed in what ethnic populations?
all ethnic populations studied thus far
What is the general range of incidence of ponticulus posticus in the populations studied?
1-41%
What is the gender bias now associated with ponticuulus posticus?
female
What is observed on the undersurface of the posterior arch of C1?
“inferior vertebral notch”
attachment site of the posterior atlanto-axial ligament
What is the location of the zygaphophysis relative to the atlanto-occipital and atlanto-axial intervertebral foramina?
it forms part of the anterior boundary of the intervertebral foramen in both cases
What muscles attach to the transverse process of C1?
rectus capitis anterior rectus capitis lateralis middle scalene levator scapula splenius cervicis obliquus capitis superior obliquus capitis inferior intertransversarii muscles
What suboccipital muscles are know to have fascial projections attaching to the spinal dura?
rectus capitis posterior minor
rectus capitis posterior major
obliquus capitis inferior
What are the connections between suboccipital muscles and the spinal dura called?
myodural bridges
What are the lateral bridges of atlas connected to?
lateral mass
transverse process of atlas
What opening is identified when a complete lateral bridge is formed?
retrotransverse foramen
What are the possible contents of the retrotransverse foramen?
the vertebral artery
brach from the suboccipital nerve
veins communicating with the venous sinuses of the neck
Which of the ponticles (bridges) of atlas is most numberous?
ponticulus posticus
Which of the ponticles (bridges) of atlas is only observed in humans?
lateral bridges
What What is observed in the transverse foramen of C1?
vertebral artery
vertebral venous plexus
postganglionic sympathetic motor nerve fibers
What is the gender variation for measurements of the transverse diameter of C1?
males - 78mm
females - 72mm