Structure and functions of Nervous systems

• Nervous Sytem

  Connects body parts and transmit signals from one part to

  another.

  It is a system of cells, tissues, organs that regulates the

  body’s responses to internal and external stimuli.
• CNS- serves as the main

  processing center for the

  entire nervous system.
• Brain- Organ located

  within the skull that

  functions are organizer

  and distributor of

  information for the body.
• Frontal Lobe

  Personality, planning problem solving

  Speech: speaking and writing (brocas area)

  Body movement (motor strip)

  Intelligence, concentration, self awareness
• Parietal lobe

  interprets languange, words

  sense of touch, pain temperature (seneory strip)

  Interprets signals from vision, hearing motor, sensory and memory

  Spacial and visual perception
• Occipital lobe

  Interprets vision (color, light, movement)
• Temporal lobe

  Understanding language (Werneck’s area)

  memory

  hearing

  sequencing and organization
• Cerebrum-

  large located on the upper

  part

  controls activity and

  thought.
• Cerebellum-

  located on the under

  cerebrum

  controls posture, balance and

  coordination.
• Brain stem-

  connects brain to the spinal

  cord

  controls automatic functions

  such as breathing, digestion,

  heart rate and blood pressure.
• Spinal cord- serves as a

  channel of signals between

  the brain and the rest of the

  body.

  Controls simple

  musculoskeletal reflexes

  without input of the brain.
• PNS- connects CNS to the

  organs and limbs.
• Somatic nervous system- this

  system is associated with the

  voluntary control of body

  movements
• Spinal cord

  the nervous carry motor and

  sensory signal between the spinal

  cord and the body.
• Cranial nervs

  the nerve fibers that carry information

  into and out of the brain stem.
• Autonomic nerves system- the

  system associated with the

  involuntary control of body

  movements.
• 2 main parts of autonomic nervous

  system

  1. sympathetic- activated in

  dynamamic role or stress.

  (increases heart rate and breathing,

  dilation of pupil, sweating)
• Parasympathetic- maintains body

  functions and restores the body to

  normal or relaxed.
• Nerve cell is the basic unit of

  nervous system.
• neurons- cell body containing

  nucleus.