Nervous system

1. DIVISIONS
of the
HUMAN
NERVOUS
SYSTEM

2. Divisions of the Human Nervous System
Autonomic Nervous
System
Cerebro-Spinal
System
 Sympathetic
System
 Parasympathetic
System
 Central Nervous
System
 Peripheral Nervous
System

3. Autonomic or Sympathetic
Nervous System
 acts as a control system functioning
largely below the level of consciousness,
and controls visceral functions.
 many of its activities are
“autonomous” or “self-regulating”

4. 2 Divisions / Systems of Autonomic NS
Sympathetic System
 consists of nerves and
ganglia
 acts as a unit; is active
in emotion
 stimulates the body only
for using energy
 involved in the “fight or
flight” response during
emergency situation or
in high emotion
Parasympathetic
System
 composed of fibers from
the cranial region
 sometimes called “rest
and digest” system as it
quiets the body and
returns it to a lower
intensity of arousal. It is
involved in relaxation. It
conserves energy and
controls sedentary

5. Cerebro-Spinal System
 The portion of the nervous system comprising the
brain, cranial nerves, spinal cord and the spinal
nerves concerned with transmission of impulses
from sense organs to the voluntary muscles
The brain and spinal cord is protected by three
meninges
Dura mater
Arachnoid
Pia mater

7. Central Nervous System
The central
nervous system
(CNS) is the
processing
center for the
nervous
system.

8. The
Brain
-It weighs 3
pounds and
contains
90% of the
body
neurons
-is a highly
specialized
organ

10. BRAIN AREAS

11. Motor Area

12. Body-sense Area

13. Visual Area

14. Auditory Area

15. Speech Area

16. Smell Area

17. Taste Area

18. Association Areas

19. Spinal Cord
The spinal
cord is the
main
pathway for
information
connecting
the brain
and
peripheral
nervous
system.