Intro to Nervous System Flashcards
What are the two neuron types in the somatic PNS?
Multipolar (motor/efferent), pseudo-unipolar (sensory/afferent)
What is referred to as a bundle of sensory and motor neurons, more specifically their axons, that emerge from the spinal cord?
Spinal nerve
The spinal nerve is ___________, containing sensory and motor neurons
Mixed
The flow of information across cells is…
Unidirectional
Where are the cell bodies found?
Ganglions
Which group of cell bodies is found in the posterior root ganglion?
Sensory neurons
Which group of cell bodies is found in the anterior horn?
Motor neurons
What are the axon bundles from sensory and motor neurons called?
Rootlets
What is the convergence of rootlets?
Roots
What is the convergence of the roots?
Spinal nerve
What is the first split of the spinal nerve called?
Rami
Posterior ramus provides sensory and motor to which muscles?
Intrinsic back muscles and associated skin
Thoracic, lumbar, sacral and coccygeal nerves are named after which vertebra?
Superior
Cervical nerves are named after which vertebra?
Inferior
What is the term for the end of the cord?
Conus medullaris
