Spinal Cord and Nerves Flashcards
-the link between the brain and the rest of the body
-ends at L1 of vertebral column as conus medullaris
Spinal cord
-type of neuron
-cell body has a single process attached
-single process divides into peripheral and central processes
Unipolar neurons
What does the peripheral process of the unipolar neurons do?
Carries sensation from skin to cell body
What does the central process of the unipolar neurons do?
Carries info away from cell body to spinal cord
-type of neuron
-have a single axon and multiple dendritic processes
Multipolar neurons
-type of neuron
-afferents
-carry sensation from the skin to CNS
-type unipolar neurons
-cell bodies form ganglia
-central processes enter spinal cord
Sensory neurons
-type of neuron
-efferents
-deliver impulses to muscles and glands
-type of multipolar neurons
-cell bodies are in spinal cord and their axons project out to their targets
Motor neurons
-type of neuron
-association neurons
-type of multipolar neurons
-receive info from sensory neurons and decide what to do with it
Interneurons
What does gray matter mostly contain?
Cell bodies of neurons
What does white matter mostly contain?
Myelinated axons of neurons
What makes up the dorsal horns?
Cell bodies of interneurons
What makes up the ventral horns?
Cell bodies of motor neurons
What makes up the dorsal root ganglia?
Clusters of cell bodies of unipolar neurons
What makes up the dorsal roots?
Central processes of unipolar neurons
What make up the ventral roots?
Axons of motor neurons in ventral horns