4. Nervous System
Central Nervous
System
Brain Spinal Cord
Forebrain Midbrain Hindbrain
Thalamus Hypothalamus
Cortex Limbic System
Corpus
Callosum
Peripheral Nervous
System
Somatic
System
Autonomic
System
Parasympathetic
Division
Sympathetic
Division
organization of
nervous system
5.
6.
7.
8. Produced by oligo dendrocytes in cns and
Schwann cells in the cns.
It appears to be white, shiny
9. White matter composed of myelinated axons.
Gray matter composed of dendrites,cell
bodies, neuroglia ,nissl bodies
23. Volume: 80 ml
Functions
◦ Mechanical protection
◦ Chemical protection
◦ circulation
24.
25.
26. Part of brain between diencephalon and
spinal cord.
27.
28. Located between the pons and spinal cord.
Containsgray matter which has centers that
play an important role in many involuntary
actions such as respiration.
The centers are called vital centers.
Therespiratorycenter
The cardiaccenter
The vasomotorcenter
29.
30.
31.
32. Part of reticular activating system is called
RAS(reticular activating system)
It helps to maintain consciousness, & active
during awakening from sleep.
35. Divided into two hemispheres, and one
middle part(vermis).
Outer layer gray matter, inner layer white
matter.
Located above the brainstem, and beneath
the occipital lobes.
42. Functions
◦ Regulator of homeo stasis
◦ Production of hormones
◦ Regulation of behavioural and emotional patterns
◦ Regulation of eating & drinking
◦ Control body temperature
◦ Regulates circardian rhythm
54. Visual receiving area and visual
association for interpreting
impulses from the retina of the eye.
55.
56.
57. Connects the gray matter areas with one
another and with other parts of the brain.
Dispersed in a tree like pattern
Made of myelinatedfibers
3 types of tracts: association tracts,
commissural tracts, projection tracts
58. major function
is to regulate
initiation
And termination
of movements.
controls the
contraction of
skeletal muscles
70. Alpha:
◦ Recorded from parietal and occipital regions.
Person is awake, relaxed, with eyes closed.
10-12 cycles/sec.
Beta:
◦ Strongest from frontal lobes near precentral gyrus.
Produced by visual stimuli and mental activity.
Evoked activity.
13-25 cycles/sec.
Theta:
◦ Emitted from temporal and occipital lobes.
Common in newborn.
Adult indicates severe emotional stress.
5-8 cycles/sec.
Delta:
◦ Emitted in a general pattern.
Common during sleep and awake infant.
In awake adult indicate brain damage.
1-5 cycles/sec.
71.
72.
73. The brain loses 5-10 % of
it’s volume between the
ages of 20-90.
The grooves widen and the
surface shrinks
74.
75.
76. It is cylindrical in shape.it extends from the
medulls oblongata to the 2nd lumbar vertebra.
Length:42-45cm
