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Neuroglia or glia cell
Support cells in the nervous system
Unable to generate AP
Neuroglia in the CNS
astrocytes
microglia
oligodendrocytes
ependymal cells
Neuroglia in the PNS
Schwann cells
satellite cells
Nuclei
Clusters of neuron cell bodies in the CNS
Make up the gray matter
Ganglia
collection of neuron cell bodies outside the CNS
Neuron fibers form_____in the CNS but _____ in the PNS
1. tracts
2. peripheral nerves
Neurofibril
cytoskeleton in Neurons
Nissil bodies
ER of Neurons
Collaterals
The branching of an axon
Neurilemma or sheath of Schwann
Plasma membrane of Schwann cell
Exists only in PNS
Unipolar
Bipolar
Multipolar neurons
sensory
olfactory and retinal cells
Majority of neurons
Epineurium
Perineurium
Endoneurium
Myelin seath
Axon
differnt layers in order of nerve
Nerve
a bundle of neuron fibers (axons) wrapped in connective tissue
Mixed nerves
Consists of both afferent and efferent fibers
Spinal nerves
PNS consists of______
cranial nerve
spinal nerve
ganglia
sensory receptors
PNS divides into_____
Sensory portioni
Motor portion
---somatic nervous system
---autonomic nervous system
*****sympathetic branch
*****parasympathetic branch
Neural tube --->____
primary brain vesicles
Primary brain vesicles consists of____
Prosencephalon
Mesencephalon
Rhombencephalon
Secondary brain vesicles:
Telencephalon
Diencephalon
-------------
Mesencephalon
-------------
Metencephalon
Myelencephalon
Adult brain structures:
Tel - cerebrum
Di - diencephalon
Mes - midbrain
Met - pons & cerebellum
Mye - brain stem (medulla)
(yellow) - spinal chord
Gyri (s. gyrus)
elevated ridges on brain
Sulci and fissures
shallow and deep grooves in brain
used as anatomical landmarks
Longitudinal fissure
divides brain into L. & R. hemispheres
Central sulcus
separates F lobe and P lobe
Lateral Sulcus
separates P lobe and T lobe
Parieto-occipital sulcus
separates P and O lobe
Lobes are named by____
cranial bones that cover them
Primary somatosensory cortex
located in postcentral gyrus of P lobe
Somatosensory association area
allows you to become aware of pain, touch and temp
Uncus
Olfactory area located deep in the T lobe
Primary motor area:
located in the precentral gyrus
Broca's area:
articulates words
Wernicke's area
where unfamiliar words are sounded out
Brain stem consists of:
peduncles
pons
medulla oblongata
Copora quadragemina
superior colliculi
inferior colliculi
Association tracts:
fiber tracts connect two portions within the same hemisphere
commissures:
fiber tracts running from one hemisphere to the other
projections:
fiber tracts that run between cerebral cortex and lower brain structures or spinal chord
Fornix
bandlike fiber concerned with olfaction and limbic fxs
septum pellucidum
separate lateral ventricles of the cerebral hemispheres
Nuclei
Islands of gray matter located in white matter of the cerebrum (basil ganglia)
caudate nucleus
letiform nucleus
---putamen and globus pallidus nuclei
corona radiata:
projection fibers coursind down precentral gyrus
combines with sensory fibers going to sensory cortex to form
internal capsule
Caudate + Lentiform nuclei
aka corpus striatum (striped body)
Epithalamus:
forms roof of 3rd ventricle
most dorsal portion of diencephalon
important structure are the pineal gland and chroid plexus
Chroid plexues
collections of capillaries within each ventricle
makes CSF
Midbrain consists of:
cerebral peduncles and copora quadragemina
Meninges of the Brain:
Dura mater
Arachnoid mater
Pia mater
Dura mater:
periosteal layer
meningeal layer
Between them is the Superior Sagital Sinus
Below it is the subdural space
Falx cerebri
extension of meningeal layer that dips into longitudinal fissure and latches to crista galli
Falx cerebelli
separates the two cerebellar hemispheres
Tentorium cerebelli
separate the cerebrum from cerebellum
Author
Alperion
ID
53675
Card Set
Biol Lab
Description
Nervous system
Updated
2010-12-06T08:19:09Z
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