WEEK 2: OVERVIEW OF NERVOUS SYSTEM AND NERVOUS SYSTEM Flashcards
How long is the spinal cord.
45cm long
Outline the parts of the spinal cord.
1.Cervical
2.Thoracic
3.Lumbar
4.Sacral
5.Coccygeal
How many spinal nerves are they?
31 pairs
How many spinal nerves does each segment of spinal cord have?
1.Cervical-C1-C8
2, Thoracic -T1-T12
3.Lumbar- L1-L5
4.Sacral- S1-S5
5.Coccygeal- Co-1
What are the 2 spinal enlargements?
Where are they located?
1.Cervical enlargement: C5-T1
2.Lumbar enlargement: S2-L3
Where does the spinal cord terminate?
What is this structure called?
L1 in adults
L3 in babies and children
Conus medullaries
What is the foramen that the spinal cord enters the skull at?
Foramen magnum
Name the nerve bundle at L2 that is shaped like a horse tail.
What is its function?
Cauda equina
To provide sensation to the lower body.
Name a delicate strand of fibrous tissue, about 20 cm in length, extending inferior ward from the apex of the conus medullaris to attach onto the coccyx.
Filum Terminale
Describe the cross section of the spinal cord.
Has gray matter, white matter and central canal.
GRAY MATTER
*Anterior, posterior and lateral gray horn
WHITE MATTER
*Anterior, Posterior and lateral funiculus.
Has Anterior median fissure
*Posterior medial sulcus
What is the function for posterior gray horn?
For entry of sensory neurons.
For motor neurons.
What is a group of cell bodies in the CNS called?
What is a group of axons in the CNS called?
What is a group of cell bodies in the periphery called?
What is a group of axons in the periphery called?
Nucleus
Tract
Ganglion
Nerve
Outline the nerve roots.
Rootlets of dorsal and ventral root
Ventral and dorsal roots
Dorsal root ganglia
Spinal nerve
Dorsal root ramus of spinal nerve
Ventral root ramus of spinal nerve
White and gray rami communicans
