Flashcards in Intervertebral Disc: Innervation Deck (27):
1
What part of the intervertebral disc is innervated?
the outer lamellae of the annulus fibrosus
2
What part of the cervical intervertebral disc is highly innervated?
the middle third of the annulus fibrosus
3
What are the types of receptor endings in the intervertebral disc?
- nociceptors
- proprioceptors
4
What morphological classifications of receptor endings are present in the intervertebral disc?
- free nerve endings
- Pacinian corpuscles
- Golgi tendon organs
- Ruffini endings
- Meissner's corpuscles
5
What is the relationship between size of the intervertebral disc and receptor endings?
the larger the disc, the greater the variety of receptor endings
6
What is the proposed function of receptor ending density in the anterior part of the intervertebral disc?
they provide feedback during extension
7
Other than receptor endings, what type of innervation is present in the intervertebral disc?
vasomotor postganglionic sympathetic nerve fibers to blood vessels
8
What are the sources of innervation of the intervertebral disc?
- the sinu-vertebral nerve (sinus vertebral nerve, recurrent meningeal nerve)
- fibers from the ventral primary ramus
- fibers from the white ramus communicans
- fibers from the paradiscal ramus communicans
- fibers from the gray ramus communicans
9
What nerves have been shown to give off the sinus vertebral/sinu-vertebral/recurrent meningeal nerve?
- the mixed spinal nerve
- ventral primary ramus
- dorsal primary ramus
- gray ramus communicans
- white ramus communicans
10
The recurrent meningeal/sinu-vertebral/sinus vertebral nerve has typically been shown to originate from which source?
the gray ramus communicans
11
What part of the intervertebral disc is innervated by the recurrent meningeal/sinu-vertebral/sinus vertebral nerve?
the outer lamellae of the annulus fibrosus at the posterior part of the intervertebral disc
12
What is innervated by the recurrent meningeal/sinu-vertebral/sinus vertebral nerve?
- the outer lamellae of the annulus fibrosus at the posterior part of the intervertebral disc
- the posterior longitudinal ligament
- dura mater plus vessels and connective tissue of the epidural space
13
What forms the posterior neural plexus of the vertebral column?
recurrent meningeal/sinu-vertebral/sinus vertebral nerve
14
What forms the anterior neural plexus of the vertebral column?
fibers from the ventral primary ramus
15
What forms the lateral neural plexus of the vertebral column?
- fibers from the ventral primary ramus
- fibers from the white ramus communicans
- fibers from the paradiscal ramus communicans
- fibers from the gray ramus communicans
16
What neural plexuses are formed, in part, by fibers from the ventral primary ramus?
the lateral and anterior neural plexuses of the vertebral column
17
What innervates the annulus fibrosus at the anterior part of the intervertebral disc?
fibers from the ventral primary ramus
18
What part of the intervertebral disc is innervated by fibers from the ventral primary ramus?
the outer lamellae of the annulus fibrosus at the anterior and lateral part of the intervertebral disc
19
What neural plexus is formed, in part, by fibers from the white ramus communicans?
the lateral neural plexus of the vertebral column
20
What innervates the annulus fibrosus at the lateral part of the intervertebral disc?
- fibers from the ventral primary ramus
- fibers from the white ramus communicans
- fibers from the paradiscal ramus communicans
- fibers from the gray ramus communicans
21
What part of the intervertebral disc is innervated by fibers from the white ramus communicans?
the outer lamellae of the annulus fibrosus at the lateral part of the intervertebral disc
22
What is the name given to the white ramus communicans which becomes embedded within the annulus fibrosus of the intervertebral disc?
the paradiscal ramus communicans
23
What neural plexus is formed, in part, by fibers from the paradiscal ramus communicans?
the lateral neural plexus of the vertebral column
24
What innervates the outer lamellae of the annulus fibrosus at the lateral part of the intervertebral disc?
- fibers from the ventral primary ramus
- fibers from the white ramus communicans
- fibers from the paradiscal ramus communicans
- fibers from the gray ramus communicans
25
What part of the intervertebral disc is innervated by fibers from the paradiscal ramus communicans?
the outer lamellae of the annulus fibrosus at the lateral part of the intervertebral disc
26
What neural plexus is formed, in part, by fibers from the gray ramus communicans?
the lateral neural plexus of the vertebral column
27