Neuroanatomy Pages 1-18 Flashcards
(146 cards)
Which type of matter is a collection of neuron cell bodies?
Gray matter
Nucleus = ?
Lamina = ?
Cortex =?
Nucleus= cluster of neuron cell bodies morphologically distinct from other nueurons Lamina= layer or band of gray matter Cortex= gray matter on outer surface of cerebrum & cerebellum
What is the definition of white matter?
An aggregation of neuronal process/axons/fibers
What are the types of white matter processes?
Tract- anatomically or functionally distinct
Fasiculus= bundle of axons
Lemniscus= ribbon or band
Funiculus= column or cord (found in spinal cord)
Ascending fibers= travelling upstream/rostrally
Descending fibers= travelling downstream/caudally
What are the 4 divisions of the CNS?
Spinal Cord
Brainstem
Cerebellum
Cerebrum
What connects the spinal cord to the cerebrum and cerebellum?
Brainstem/ Bulb
Does the brainstem include gray matter, white matter, or both?
Both
Does the brainstem include ascending or descending fiber tracts, or both?
Both
What are the three divisions of the brainstem?
Medulla, Pons, Midbrain (Mesencephalon)
Does the Medulla include gray matter, white matter, or both?
Both
What cranial nerve nuclei are found in the Medulla?
12, 11, 10, 9, and parts of 8 & 5
Where are the Inferior Olivary Nuclei (olives) found?
Medulla
Does the medulla include ascending fibers, descending fibers, or both?
Both
Medullary pyramids are an example of ascending fiber tracts in the white matter of the medulla. T or F
False- pyramids are indeed in the white matter of the medulla, but are comprised of descending fibers (motor)
What two areas do the Inferior Cerebellar Peduncles help to attach?
The cerebellum to the medulla
consists of fibers going to and from the cerebellum
Which part of the brainstem is considered as the “bridge”?
Pons
Cranial nerve nuclei are found in the dorsal pons or the ventral pons?
Dorsal pons
Which cranial nerve nuclei are found in the gray matter of the pons?
6, 7, and parts of 8 & 5
T or F, the dorsal pons and the ventral pons include both gray and white matter.
True
Where is the Pontine Nuclei found?
The Ventral Pons/ Basilar Pons
What is the function of the Pontine Nuclei?
receives input from neurons of the ipsilateral cerebral cortex
projects axons to the contralateral side of the cerebellum
What makes up the Middle Cerebellar Peduncle and what areas does this peduncle attach?
The fibers of the pontine nuclei make up the MCP and the MCP attaches the Pons to the Cerebellum
Which part of the brainstem is most superior?
Midbrain
Which part of the brainstem includes the ventricular system?
Midbrain