Exam One Study Questions Flashcards
Which mammals have more than seven cervical vertebrae?
The ant bear and three toed sloth
What constitutes the spine?
The 24 presacral segments; the cervical, thoracic, and lumbar vertebrae
Which mammals have less than 7 cervical vertebrae?
The manatee and two toed sloth
What does the term “thoracic” refer to?
Brest plate or chest; it referred to the armor bearing region of the torso
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
Differences in the number and morphology of vertebrae within the population based on male and female variation is identified as which type of variation?
Gender variation or sexual dimorphism
Differences in the number and morphology of vertebrae within the population based on age of developmental variation is identified as which type of variation?
Ontogenetic variation
Differences in the number and morphology of vertebrae within the population based on ethnicity of locational variation is identified as which type of variation?
Geographic variation of population based variation
Differences in the number and morphology of vertebrae within the population based on the variation between individuals is identified as which type of variation?
Idiosyncratic variation
What is the length of a typical male spinal column?
About 70 centimeters or 28 inches
What is the length of a typical female spinal column?
About 60 centimeters or 25 inches
What is the length difference between a typical male and a typical female spinal column?
About 3 inches
Based on the numbers for individual regions of the vertebral column, what is the length of the male spine (both measurements)?
About 58 centimeters or 23 inches
5
11
7
5
What specifically is responsible for the 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 are the three basic osseous parts of a vertebra?
The vertebral body, vertebral arch, and the apophyseal regions
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 large opening is usually observed at the back of the vertebral body?
The basivertebral venous foramen
What is the semicircular region of the bone attached to the back of the vertebral body called?
The vertebral arch
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 is the name given to abnormal bone at the attachment site of the ligamentum flavum?
Para-articular process
What classification of bone will para-articular processes represent?
Accessory bone
What is the name given to the overlap of laminae seen on x-Ray?
Shingling
What is the name given to the lamina - pedicle junction at each region of the spine?
Cervical - articular pillar; thoracic and lumbar - pars interarticularis
What is the name given to the junction of the vertebral arch - spinous process on lateral x-Ray?
The spinolaminar junction
All non-rib-bearing vertebra of the spine retain what equivalent feature?
The costal element
What will cause the transverse process/transverse apophysis to alter its initial direction in the cervical region?
Cervical spinal nerves are pulled forward to form the cervical and brachial nerve plexuses thus remodeling the transverse process to accommodate their new position
What will cause the transverse process/transverse 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 part of the vertebra forming the pre-zygapophysis?
The superior articular process or superior articular apophysis
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, and the ligamentum flavum
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/spinous apophysis?
Calculate the angle formed between the undersurface of the spinous process/spinous apophysis and the horizontal plane.
What is the name given to the normal overlap of spinous processes or spinous apophyses as seen on x-Ray?
Imbrication
What is the orientation of the spinous process/spinous 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/vertebral column?
Cervical - triangular; thoracic - oval; lumbar - triangular; sacral - 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; tender or delicate mother
Which meningeal space is now thought to be a potential space, not an actual space?
Subdural space - between the dura mater and the arachnoid mater
what is the name given to the fluid within the epidural space?
interstitial fluid
What is the name given to the fluid with the subarachnoid space?
cerebrospinal fluid
What branch of the segmental artery supplies the vertebra and the paraveretbral region?
dorsospinal artery
Which branches of the spinal artery supply the contents of the epidural space?
osseous arteries, anterior spinal canal artery, posterior spinal canal artery
Which branches of the spinal artery supply the contents of the subarachnoid space?
anterior radicular artery, posterior radicular artery, anterior medullary feeder artery, posterior medullary feeder artery
The anterior spinal artery is a branch of which artery?
the vertebral artery
As the anterior spinal artery continues along the spinal cord, which arteries unite along its length to give the appearance of a single continuous vessel?
anterior medullary feeder arteries
The posterior spinal artery is a branch of which artery?
the posterior inferior cerebellar artery
As the posterior spinal artery continues along the spinal cord, which arteries unite along its length to give the appearance of a single continuous vessel?
posterior medullary feeder arteries
WHat forms the arterial vasa corona above C3?
right and left anterior spinal arteries, right and left posterior spinal arteries, and 4 communicating arteries
What forms the arterial vasa corona below C 6?
a median anterior spinal artery, right and left posterior spinal arteries, and 3 communicating arteries
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
Which vessels form the venous vasa corona?
right and left anterior longitudinal veins, right and left posterior longitudinal veins, and 4 communicating veins
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
What is the generic cord level of origin - vertebral level combination for the lumbar/lumbosacral enlargment?
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 T 12 vertebra
What spinal nerves originate from the conus medullaris?
typically S4, S5, and Co1
In which vertebral foramen will the conus medullaris typically be observed?
L1
Neural tissue has been identified in what part of he filum terminale?
proximal part of the filum terminale internum
What is the fate of the neural tissue identified along the filum terminale internum?
it joins peripheral nerve roots of spinal nerves as high as L3 and as low as S4
The last arterial vasa carona creates what feature on angiogram?
cruciate anastomisis
what is the name given to the condensation of meniges below S2?
filum terminale externum
What is the name given to the caudal attachment of the meninges?
coccygeal medullary vestige
What is the name given to the condition where the conus medullaris is located below L1 and the filum terminale is thickened?
tethered cord syndrome
What is the relationship between spinal nerve number, rib number, and vertebral number in a thoracic intervertebral foramen?
the spinal nerve number relates to the upper segment number in the vertebral couple the rib number relates to the lower segment number in the vertebral couple i.e. T3 nerve exits the intervertebral foramen formed by T3/T4 and rib 4 joints with this vertebral couple
What is the primary constituent of the ground substance?
glycosaminoglycans
What is the principal type of protein fiber in bone?
collagen type 1
What is the most frequently described deposit in bone?
hydroxyapatite
What is Wolff’s Law as it pertains to bone?
living tissue will respond to stressors; bone is formed or absorbed in response to stress
What is the name given to the pattern of ossification in mesenchyme?
intramembranous ossification
What is the timing for the appearance of intramembranous ossification?
from the second to third month in utero
What is the name given to the pattern of ossification in cartilage?
endochondral ossification
What is the timing for the appearance of ossification in cartilage?
from the second to fifth month in utero
What part of the skull is derived from endochondral ossification?
chondrocranium
Which skull bones are ossified by both endochondral and intramembranous ossification?
the mandible, sphenoid, temporal & occipital bones
What bone of the axial skeleton is formed by both endochondral and intramembranous ossification?
the clavicle
What are the names given to the parts of a long bone?
the diaphysis (shaft) and typically two epiphyses (extremities)
What are examples of short bones?
most of the bones of the carpus and tarsus
What are examples of pneumatic bone?
frontal, ethmoid, maxilla, sphenoid & temporal
What is the characteristic of sesamoid bone?
The bone develops within a tendon
What are consistent examples of sesamoid bones?
patella and pisiform
What are the three responses of bone which allow it to be iscribed as ‘living’?
It has the ability to heal, to remodel under stressors and to age
What are the four basic surface feature categories?
elevations, depressions, tunnels or passageways & facets
WHat are the types of osseous linear elevation?
the line, ridge and crest
WHat are the types of rounded osseous elevations?
tubercle, protuberance, trochanter, tuber or tuberosity, and malleolus
What are the categories of sharp osseous elevations?
spine and process
What are the categories of osseous linear depressions?
notch or incisure, groove, and sulcus
What are the categories of rounded osseous depressions?
the fovea and fossa
What are the names given to openings on the surface of bone?
ostium or orifice and hiatus
What is the definition of an osseous foramen?
an ostium passing completely through a thin region of bone?
What is the definition of an osseous canal?
an ostium passing completely through a thick region of bone
What is the definition of an osseous meatus?
a blind-ended passageway which does not completely penetrate through a bone
what is the definition of an osseous fissure?
an irregular slit-like or crack-like appearance between the surfaces of adjacent bones
What are the categories of rounded osseous facets?
articular heads and articular condyles?
What is the name given to the adult skull minus the mandible?
the cranium
What is the total number of bones forming the typical adult skull?
28 bones