Cervical Disc Disease Flashcards
What nerves innervate the outer 1/3 of the annulus?
Sinuvertebral nerve (from somatic root) Vertebral nerve (from autonomic root)
What traps and holds water, which is what gives the nucleus pulposus its strength and resiliency?
Proteoglycan aggrecan
How much water can proteoglycan aggrecan hold?
500x its weight
Where is the referred pain for C3-C4 disc?
C7 spinous process and posterior border of trapezius
Where is the referred pain for C4-C5 disc?
Superior angle and spine of scapula
Where is the referred pain for C5-C6 disc?
Center of the medial border of scapula
Where is the referred pain for C6-C7 disc?
Inferior angle of scapula
What root does a HNP of the C4-C5 disc hit?
C5 nerve root
What is the most common cause of cervical radiculopathy?
Foraminal Encroachment (70-75%)
How much is a cervical HNP responsible for radiculopathies?
20-25%
What are the most common sites for a Cervical disc herniation?
C5 and C6
What nerve root is the most common incidence for cervical radiculopathies?
C7
What describes pathological annular fissuring within the disc without external disc deformation due to trauma/whiplash?
Internal Disc Derangement
What is the major pain generator for IDD?
Outer 1/3 of annulus
What is an area where pain is experienced with root pathology?
Dynatomes
