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Nervous System

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Engers Fernandez

on 23 June 2015

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Transcript of Nervous System

Nervous System
Integrative Machinery
Neuron
basic building block of the nervous system, specialized to transmit information throughout the body.
Dendrites
along which impulses received from other cells at synapses are transmitted to the cell body.
Cell Body (Soma)
is the bulbous end of a neuron, containing the cell nucleus
Nucleus
It contains most of the cell's genetic material
Axon
the long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells.
mixture of proteins and phospholipids forming a whitish insulating sheath around many nerve fibers, increasing the speed at which impulses are conducted.
Myelin Sheath
Nissl bodies
granules are rough endoplasmic reticulum (RER) with rosettes of free ribosomes, and are the site of protein synthesis
is the last site in the soma where membrane potentials propagated from synaptic inputs are summated before being transmitted to the axon
In the central nervous system, a collection of neuron cell bodies is called a nucleus.

In the peripheral nervous system, a collection of neuron cell bodies is called a ganglion (plural: ganglia).
Nuclei Vs. Ganglia
Tract Vs. Nerve
Tracts are bundles of axons in the Central Nervous System.

Nerves are bundles of axons in the Peripheral Nervous System.
Glial Cells
non-neuronal cells that maintain homeostasis, form myelin, and provide support and protection for neurons in the brain and peripheral nervous system.
H
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M
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W
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K
CLASSIFICATION OF NEURONS
Structure
Function
a neuron conducting impulses inwards to the brain or spinal cord
a nerve cell forming part of a pathway along which impulses pass from the brain or spinal cord to a muscle or gland
(Afferent)
(Efferent)
is a neuron that forms a connection between other neurons.
Interneuron
Connector Neuron
Classification of Nerves
Afferent (Sensory):
a nerve that passes impulses from receptors toward or to the central nervous system,

Efferent (motor):
a nerve that conveys impulses toward or to muscles or glands

Mixed:
A nerve that contains both motor and sensory nerve fibers.
Amazing Nervous System
Dr. Engers Fernandez
1980 - London
18,947,668,177,995,426,462,773,730
18,947,668,177,995,426,462,773,730
Jack Andraka
*2012 Gordon E. Moore Award
* Intel International Science and Engineering Fair
Kim Ung-Yong
Master Calculus - 4 Years Old
Gyrus (Giry):
a ridge or fold between two clefts on the cerebral surface in the brain.
sulcus (Sulci)
: depression, e on the brain surface, separating the gyri.
Longitudinal Fissure
Corpus Callosun
Diencephalon
Infundibulum
Epithalamus
Brainstem
Meninges
the three membranes that line the skull and vertebral canal and enclose the brain and spinal cord.
dura mater
arachnoid
pia mater
Cerebral Spinal Fluid
Full transcript