Typical Cervical Vertebrae C3-C6 Flashcards
Which mammals have more than seven cervical vertebrae?
ant bear, three-toed sloth
Which mammals have less than seven cervical vertebrae?
two-toed sloth, manatee
What is the number of vertebrae in the typical cervical spine?
seven segments
Which vertebrae are typical cervicals?
C3-C6
Which vertebrae are atypical cervicals?
C1, C2, C7
What is the shape of the typical cervical vertebral body from the cranial view?
rectangular
What is the appearance of the typical cervical vertebral body from the lateral view?
posterior height is greater than anterior height by a few millimeters
What wold be the direction of the cervical curve based on osseous features?
posterior or kyphotic
What accounts for the direction of the typical cervical curve?
the intervertebral disc height
What is the direction of the typical cervical curve?
anterior or lordotic
At which vertebral couple will the cervical curve again increase intervertebral disc height?
C5/C6
What is the effect of aging on the cervical vertebral body?
it diminishes the overall height of the vertebral body
What are the modifications of the superior epiphyseal rim of a typical cervical?
anterior groove, posterior groove, right and left uncinate processes
What are the names of the lateral modification of the superior epiphyseal rim?
uncinate process, unciform process, uncovertebral process, uncus, or lateral lip
At what developmental age will the uncinate process first be observed?
3rd - 4th fetal month
What are the modifications of the inferior epiphyseal rim of a typical cervical?
anterior lip, posterior lip, right and left lateral grooves
What are the names given to the lateral modifications of the inferior epiphyseal rim?
lateral groove or enchancrure
What is the joint classification for the anterior lip-anterior groove articulation?
fibrous (amphiarthrosis) syndesmosis
What is the joint classification for the posterior lip-posterior groove articulation?
fibrous (amphiarthrosis) syndesmosis
What is the joint classification for the uncinate process-lateral groove articulation?
modified synovial saddle (diarthrosis sellar)
What is the joint classification for the spongy bone-intervertebral disc articulation?
cartilaginous (amphiarthrosis) symphysis
How many joint surfaces are present on the upper surface of a typical cervical vertebral body?
five
How many joint surfaces are present on the lower surface of a typical cervical vertebral body?
five
How many joint surfaces are present on the vertebral body of a typical cervical?
ten
How many synovial joint surfaces are present on the vertebral body of a typical cervical?
four
What joint surfaces are present on the vertebral body of a typical cervical?
- anterior groove
- posterior groove
- right uncinate process
- left uncinate process
- superior spongy bone surface
- anterior lip
- posterior lip
- right lateral groove
- left lateral groove
- inferior spongy bone surface
What synovial joint surfaces are present on the vertebral body of a typical cervical?
- right and left uncinate process
- right and left lateral groove
What is the name given to the uncinate process-lateral groove articulation?
joint of Luschka or uncovertebral joint
What does the recent literature suggest as to the nature of the joint of Luschka?
the joint is representative of intervertebral disc aging, which results in loss of lamellar integrity near the joint
What is the functional significance of the joint of Luschka?
it appears to stabilize the intervertebral disc while accommodating flexion-extension and requiring coupled motion (axial rotation with lateral bending) in the cervical spine
What muscle attaches to the typical cervical vertebral body?
the longus coli muscle
What is the orientation and angulation of the pedicle of a typical cervical?
posterolateral, 45 degrees
At what location on the vertebral body of a typical cervical will the pedicle attach?
to the side and in the center of the vertebral body
What surface feature is located at the upper margin of the pedicle?
superior vertebral notch
What surface feature is located at the lower margin of the pedicle?
inferior vertebral notch
Which spinal nerve will be accommodated on the superior vertebral notch of C5?
C5 spinal nerve
Which spinal nerve will be accommodated on the inferior vertebral notch of C5?
C6 spinal nerve
What is the direction of projection of the cervical lamina?
posteromedially
What ligament attaches to the lamina of a typical cervical?
ligamentum flavum
What joint classification will be associated with the ligamentum flavum and its attachment?
fibrous (amphiarthrosis) syndesmosis
Ossification of the ligamentum flavum at the attachment site on the lamina will result in what feature?
para-articular processes
Ossification of the ligamentum flavum at the attachment site on the lamina will be associated with which classification of bone?
accessory bone
Ossification within in the length of the ligamentum flavum will be associated with which classification of bone?
hetertopic bone
What is the outline of the vertebral foramen of a typical cervical vertebra?
heart-shaped or triangular
Which is the greatest diameter of the vertebral foramen of typical cervicals?
transverse
What soft tissue diameter mimics the outline of the typical cervical vertebral foramen?
the transverse diameter of the cervical enlargement of the spinal cord
The greatest transverse diameter of the typical cervical vertebra occurs at which level?
C6
The greatest frequency of osteophytes associated with the vertebral body occurs at which typical cervical vertebral couple?
C5/C6
What osseous parts form the typical cervical vertebra transverse process?
- costal element
- anterior tubercle
- costotransverse bar
- posterior tubercle
- true transverse process
What is the distal modification of the costal element of a typical cervical vertebra?
anterior tubercle
What muscles will attach to the anterior tubercle of a typical cervical vertebra?
- anterior scalene
- longus capitis
- longus colli
- anterior intertransversarii
What is the distal modification of the true transverse process of typical cervicals?
the posterior tubercle
What muscles may attach to the posterior tubercle of a typical cervical vertebra?
- splenius cervicis
- iliocostalis cervicis
- longissimus cervicis
- levator scapula
- middle scalene
- posterior scalene
- rotators
- posterior intertransversarii
What bony feature connects the anterior and posterior tubercles of a typical cervical transverse process?
costotransverse bar or intertubercular lamella
What muscles will attach to the costotransverse bar?
- middle scalene
- posterior intertransversarii
What is the name given to to collective rib-forming region?
the pleurapophysis
What produces the primary tension on the transverse process that will cause remodeling in the anterolateral and inferior directions?
cervical spinal nerves as they are directed anterolaterally and inferiorly to form the cervical and brachial plexuses
What is the name given to the superior margin of the costotransverse bar?
sulcus for the ventral primary ramus of a cervical spinal nerve
What is the orientation and angulation of a typical cervical transverse process?
60 degrees anterolaterally (from midsagittal plane), 15 degrees inferiorly (from the horizontal plane)
What is the name given to the modification of the anterior tubercle of the C6 transverse process?
the carotid tubercle
What will cause remodeling of the anterior tubercle at C6?
the common carotid artery
What will occupy the typical cervical vertebra transverse foramen?
- the vertebral artery
- vertebral venous plexus
- postganglionic sympathetic motor nerve fibers
What part of the peripheral nerve system is observed in the transverse foramen of typical cervical vertebrae?
postganglionic sympathetic motor nerve fibers of the autonomic (involuntary or visceral) nerve system
What is the name given to the lamina-pedicle junction of typical cervical vertebrae?
the articular pillar
What is the name given to the surface feature observed between the ends of the articular pillar?
the groove/sulcus for the dorsal ramus of a cervical spinal nerve
What nerve indents the articular pillar of typical cervical vertebrae?
the medial branch of the dorsal ramus of a cervical spinal nerve
What is the classic angulation of typical cervical articular facets?
40 to 45 degrees from the coronal plane
Recent work suggests what angulation for typical cervical articular facets?
55 to 60 degrees
What is the orientation of the typical cervical superior articular facet?
backward, upward, medial (BUM)
What is the orientation of the typical cervical inferior articular facet?
forward, lateral, downward (FoLD)
What muscles will attach to typical cervical articular processes?
- the longissimus capitis
- longissimus cervicis
- semispinalis capitis
- semispinalis cervicis
- multifidis
- rotators
What muscles blend with the capsular ligament of cervical zygapophyses?
- semispinalis capitis
- mutifidis
- rotator longus
What is the joint classification for the typical cervical zygapophysis?
synovial plane (diarthrosis arthrodia) joint
What modifications of the synovial joint are observed in the cervical spine?
meniscoidal folds
What function will meniscoidal folds provide in cervical zygapophyses?
they are assumed to distribute pressure across the joint surfaces
What will influence spinal kinematics?
- geometry of articular facets
- mechanical properties of connective tissue
- mechanical properties of muscles
What should be carefully considered when applying reasearch results to a population?
- the condition of the subject material (fresh cadaver, fixed cadaver, living subject)
- the age range of the population studied
- the method of measurement (x-ray, goniometer, MRI, CT, etc.)
The greatest range of flexion-extension among the typical cervical vertebrae occurs at which vertebral couple?
typically C5/C6
What motions are coupled in the cervical spine?
lateral bending and axial rotation
Ranges of coupled motion among the typical cervical vertebrae will be similar for what cervical vertebral couples?
the C2/C3, C3/C4, C4/C5 vertebral couples
Ranges of couple motion among the typical cervical vertebrae will begin to decrease at what cervical vertebral couple?
the C5/C6 vertebral couple
What is the usual condition for the Caucasian typical cervical spinous process?
they are bifid
What is the usual condition for the African-American typical cervical spinous process?
they are non-bifid
What is the osseous modification at the distal end of the spinous process?
the spinous tubercle
What muscles may attach to the typical cervical spinous process?
- spinalis cervicis
- semispinalis cervicis
- semispinalis thoracis
- multifidis
- rotators
- interspinalis
What ligaments will attach to the typical cervical spinous process?
- interspinous ligament
- ligamentum nuchae
What will form the anterior boundary of a typical cervical intervertebral foramen?
- the lateral groove and vertebral body of the segment above
- the uncinate process and vertebral body of the segment below
- the intervertebral disc
- posterior longitudinal ligament
What will form the posterior boundary of a typical cervical intervertebral foramen?
- the inferior articular process (post-zygapophysis)
- the superior articular process (pre-zygapophysis)
- the capsular ligament
- ligamentum flavum
What will form the superior boundary of a typical cervical intervertebral foramen?
inferior vertebral notch/incisure
What will form the inferior boundary of a typical cervical intervertebral foramen?
superior vertebral notch/incisure
What will form the unique anterior boundary of a typical cervical intervertebral foramen?
the uncinate process of the segment below and lateral groove of the segment above forms the joint of Luschka
What forms the unique anterior boundary of the intervertebral foramen for the C4 spinal nerve?
the lateral groove of C3 and uncinate process of C4 forming the joint of Luschka