Study Guide Questions- Exam 1 Flashcards
What is the number of vertebrae in the typical spine?
24 segments
What constitutes the spine?
the 24 presacral segments; the cervical, thoracic, and lumbar vertebrae
Which mammals do not have seven cervical vertebrae?
the two-toed sloth, manatee, ant bear, and three-toed sloth
Which mammals have more than seven cervical vertebrae?
the ant bear and three-toed sloth
Which mammals have less than seven cervical vertebrae?
the manatee and two-toed sloth
What does the term “cervical” refer to?
the region of the neck
what does the term “lumbar” refer to?
The loin, the region between the rib and the hip
What does the term “coccyx” refer to?
A cuckoo birds’ bill or cuckoo birds’ beak
Which variations account for the disparity in number and morphology of vertebrae within the population?
gender variation or sexual dimorphism, ontogenetic variation, geographic or population based variation, and idiosyncratic variation.
Differences in the number and morphology of vertebrae within the population based on ethnicity variation is identified as which type of variation?
geographic variation or population based variation
What is the length of a typical male spinal column?
70 cm or 28 in
What is the length of a typical female spinal column?
60 cm or 25 in
What is the length of the male cervical region (both measurements)?
12 cm or 5 in
What is the length of the male thoracic region (both measurements)?
28 cm or 11 in
What is the length of the male lumbar region (both measurements)?
18 cm or 7 in
What is the length of the male sacrum (both measurements)?
12 cm or 5 in
Based on the numbers for individual regions of the vertebral column, what is the length of the male spine (both measurements)?
58 cm or 23 in
How does the vertebral column participate in skeletal formation?
Ribs are formed from the costal process of the embryonic vertebral template
What levels of the vertebral column specifically accommodate weight bearing transfer?
S1-S3 at the auricular surface
What specifically is responsible for shape and position of the human frame?
comparative anterior vs posterior height of the vertebral body and comparative anterior vs posterior height of the intervertebral disc
What organ(s) are specifically associated with the horizontal axis of the skull?
the eye and the vestibular apparatus of the inner ear
What is the general shape of the vertebral body at each region of the spine?
cervical- rectangular
thoracic- triangular
lumbar- reniform
What are the ages of appearance and the events occurring at each step in the formation of bone at the superior and inferior surface of the vertebral body?
ages 7-9 years, appearance of epiphyseal plate centers of ossification
age 12 years, formation of the epiphyseal ring
age 15 years, formation of the epiphyseal rim
What are the names of the openings found around the margins of the vertebral body?
nutrient foramina or vascular foramina
What large opening is usually observed at the back of the vertebral body?
The basivertebral venous foramen
What is the name given to the large vessel exiting the back of the vertebral body?
the basivertebral vein
What is the generic orientation of the pedicle at each region of the spine?
Cervical- posterolateral
Thoracic- posterior, slight lateral
Lumbar- posterior
What ligament will attach to the lamina?
the ligamentum flavum
What classification of bone will para-articular processes represent?
accessory bone
What is the name given to the overlap of laminae see on an x-ray?
Shingling
What is the generic orientation of the transverse process or transverse apophysis at each region of the spine?
Cervical- anterolateral
Thoracic- posterolateral
Lumbar- lateral
What will cause the transverse process/apophysis to alter its initial direction in the cervical region?
Cervical spinal nerves are pulled forward to form the cervical and brachia nerve plexuses thus remodeling the transverse process to accommodate their new position.
What will cause the transverse process/apophysis to alter its initial direction in the thoracic region?
The growth of the lungs remodel the shape of the ribs which in turn push the transverse processes backward.
What is the name given to the bone surface at the front of a zygapophysis?
The superior articular facet
What is the name given to the bone surface at the back of a zygapophysis?
The inferior articular facet
In the vertebral couple, the part of the vertebra which lies anterior to the zygapophysis is called the ___________.
Pre-zygapophysis
In the vertebral couple, the part of the vertebra which lies posterior to the zygapophysis is called the ____________.
Post-zygapophysis
What will form the posterior boundary of a typical intervertebral foramen?
the inferior articular process/post-zygapophysis
the superior articular process/pre-zygapophysis
the capsular ligament
the ligamentum flavum
What will form the superior boundary of a typical intervertebral foramen?
the inferior vertebral notch or inferior vertebral incisure
What will form the inferior boundary of a typical intervertebral foramen?
the superior vertebral notch or superior vertebral incisure
What will form the anterior boundary of a typical intervertebral foramen?
the vertebral body of the segment above
the vertebral body of the segment below
the intervertebral disc
the posterior longitudinal ligament
What is the method of calculating the angle of the spinous process/apophysis?
Calculate the angle formed between the undersurface of the spinous process/apophysis and horizontal plane
What is the name given to the normal overlap of spinous processes/apophyses as seen on an x-ray?
Imbrication
What is the orientation of the spinous process/apophysis at each region of the spine?
cervical- slight angle inferiorly
thoracic- noticeable angle inferiorly
lumbar- no inferior angle
What neural structures will occupy the vertebral foramen until the level of L2?
the spinal cord/spinal medulla/medulla spinalis, the proximal part of the peripheral nerve system and the meninges.
What is the typical shape/outline of the vertebral foramen at each region of the spinal column?
Cervical- triangular
Thoracic-oval
Lumbar- triangular
Sacrum- triangular
Identify the meninges of the spinal cord/spinal medulla/medulla spinalis and the commonly accepted meaning of each
Dura mater- tough mother
Arachnoid mater- spider mother
Pia mater- delicate or tender mother
Name and locate each space formed between the osseous vertebral foramen and the spinal cord/spinal medulla/medulla spinalis
Epidural space- b/w the vertebral foramen & dura mater.
Subdural space- b/w the dura mater & the arachnoid mater.
Subarachnoid space- b/w the arachnoid mater & the pia mater.
What are the contents of the epidural space?
Anterior & Posterior spinal canal artery & plexus,
A & P internal vertebral venous plexus,
Basivertebral vein,
Recurrent meningeal/ sinu-vertebral/ sinus vertebral nerve,
Hofmann/anterior dural/meningovertebral ligaments,
Ligamentum flavum,
Posterior longitudinal ligament.
Which of the contents of the epidural space will be found near the vertebral body?
Anterior spinal canal artery & plexus,
Anterior internal vertebral venous plexus,
Basivertebral vein,
Recurrent meningeal/sinu-vertebral/sinus vertebral Nerve,
Posterior longitudinal ligament,
Hofmann/anterior dura/meningovertebral ligaments.
Which of the contents of the epidural space will be found near the lamina?
posterior spinal canal A & V
posterior internal vertebral venous plexus
ligamentum flavum
Which of the contents of the epidural space are more likely located near or around the posterior longitudinal ligament?
Anterior spinal canal artery & plexus
Anterior internal vertebral venous plexus
Basivertebral vein
Recurrent meningeal/sinu-vertebral/sinus vertebral nerve
Hofmann/anterior dural/meningovertebral ligaments
What is the name given to the fluid within the epidural space?
interstitial fluid
What is the name given to the fluid within the subdural space?
Serous fluid
What is the name given to the fluid within the subarachnoid space?
Cerebrospinal Fluid
The anterior spinal artery is a branch of which artery?
The vertebral artery
The posterior spinal artery is a branch of which artery?
the posterior inferior cerebellar artery
What forms the arterial vasa corona above C3?
right and left anterior spinal arteries,
right and left posterior spinal arteries,
& 4 communicating arteries
What forms the arterial vasa corona below C6?
a median anterior spinal artery,
right and left posterior spinal arteries,
& 3 communicating arteries
Which vessel will supply the ventral/anterior nerve rootlet and nerve root?
anterior radicular artery
Which vessel will supply the dorsal/posterior nerve rootlets, nerve root and nerve root ganglion?
posterior radicular artery
What arterial vasa corona branches supply gray matter and most of the spinal cord?
ventral/central/sulcal perforating arteries
What arterial vasa corona branches supply about one-third of the spinal cord?
Pial perforating arteries
What is the primary artery supplementing the arterial vasa corona?
Anterior & Posterior Medullary Feeders
What vessels drain the spinal cord?
Pial veins
Which vessels form the venous vasa corona?
right and left anterior longitudinal veins,
right and left posterior longitudinal veins,
& 4 communicating veins
Which vessels will drain the ventral/anterior nerve roots?
anterior radicular veins
What vessel will drain the dorsal/posterior nerve root ganglion?
posterior radicular vein
What venous vessels are identified in the intervertebral foramen?
intervertebral veins
What veins are observed in the epidural space near the posterior longitudinal ligaments?
anterior internal vertebral venous plexus,
basivertebral vein
What is the continuation of pia mater below the conus medullaris called?
filum terminale internum
What is the location and name given to the area where all meninges first converge at the caudal part of the vertebral column?
typically S2, the dural cul de sac
In horizontal view, what direction of the spinal cord tends to be largest?
transverse
What are the spinal cord enlargement locations and the name given to each?
C3-T1 The Cervical Enlargement
T9-T12 The Lumbar/Lumbosacral enlargement
Where is the greatest transverse diameter of the spinal cord?
C6
What is the generic cord level of origin- vertebral level combination for the lumbar/lumbosacral enlargement?
L1, L2 cord levels in T9 vertebra;
L3, L4 cord levels in T10 vertebra;
L5, S1 cord levels in T11 vertebra;
S2, S3 cord levels in T12 vertebra
What is the caudal end of the spinal cord called?
Conus medullaris
What spinal nerves originate from the conus medullaris?
Typically S4, S5 & Co1
In which vertebral foramen will the conus medullaris typically be observed?
L1
The last arterial vasa corona creates what feature on angiograms?
cruciate anastomosis