Spinal Cord Flashcards
Second name of spinal cord
Medulla
In what structure do you find the spinal cord
the vertebral canal upper 2/3
Upper limits of spinal cord
Upper border of atlas
How is the end of the spinal cord called
Conus medullaris
Where does The spinal cord to terminate in adults
Between L1 and L2
Where does the spinal cord terminates at birth
L3
Length of spinal cord
45 cm long in European nails
What is a spinal cord segments
Portion from which a pair of spinal nerves emerge
How many spinal cord segments in the body
31
What are the different type of spinal cord segments
Eight cervical segment 12 thoracic segments five number segment five sacral segment one coccygeal
How many spinal enlargement
2
1 cervical one lumbar
From where to where does the cervical enlargement extends to
From C3 to T2 with maximum- Circumference at c6
Where does the lumbar enlargement extends from
From L1 to S3
Maximum circumference at L3
What is the denticulate filament
Bilateral triangular lateral extensions of pia matter which anchor the spinal cord to the Dura matter
What is the filum terminale
Fibrous bands that extends from the conus medullaris to the posteriorieum of the coccyx which fixates stabilize and buffer the distal spinal cord
What is the spinal nerve roots
Part of the nerve that branches off from the spinal cord and enters into the intervertebral foramen
What are the different fissure of the spinal cord
deep anterior median Fissure
What are the different sulci of spinal cord
Posterior median sulcus
posterior lateral sulcus
posterior intermediate sulcus ( only cervical abd upper thoracic)
Is dorsal root sensory or motor
Sensory
Does the dorsal root have a ganglion
Yes
Is ventral root motor or sensory
Motor
What are the longest nerve root of the spinal cord
Lumbosacral roots