brainn

• CNS

  Controls all aspects of your body including Personality-Temperament-Motor control and Homeostasis
• CNS

  Structural and functional center of the nervous system it -Receives and interprets information and-Sends a response
• CNS

  Composed of grey matter (unmyelinated) and-White matter (myelinated)
• the spinal chord- the link between the brain and the PNS, and is the primary reflex centre (reflex arc)
• Cerebrospinal fluid- fluid that surrounds the brain and spinal cord and acts as a shock absorber and transport medium.
• The brain is protected by the skull, cerebrospinal fluid and meninges
• The spinal chord is protected by the vertebral column and the cerebrospinal fluid
• Meninges are the three protective membranes that surround the brain and spinal chord
• brain is composed of 3 regions forebrain, midbrain and hindbrain. the largest part of the brain is the cerebrum (wrinkly) and the brain is divided into the left and right hemisphere

  A) forebrain

  B) midbrain

  C) hindbrain

  
• left brain controls the left side of body, right brain controls right side of body
• corpus callosum- connects the right and left hemisphere of the brain

  A)

  
• the surface of the cerebrum is called the cerebral cortex. it has many folds called fissures which increase the surface area. the cerebral cortex is composed of grey matter and has 4 lobes: frontal, parietal, occipital and temporal

  A) cerebral cortex

  
• frontal lobe: motor areas control movement of voluntary muscles such as walking and speech and are linked to intellectual activities and personality

  A)

  
• temporal lobe- sensory areas are associated with vision and hearing, and linked to memory and interpretation of sensory information

  A)

  
• occipital lobe- associated with vision and interpreting visual information, also connects to the optic nerve of the eye

  A)

  
• parietal lobe- associated with touch, temperature awareness and body position, and linked to emotions and interpreting speech

  A)

  
• thalamus- receives and directs incoming sensory information

  A)

  
• hypothalamus- receives information from thalamus and controls the pituitary gland. it acts as a link between the nervous and endocrine systems and is a key player in maintaining homeostasis

  A)

  
• cerebellum- controls involuntary movement and balance

  A)

  
• pons(bridge)- acts as a relay station between cerebellum and medulla

  A) pons

  
• medulla oblongata- connects brain to the spinal chord and acts as a connection between the CNS and PNS. it controls involuntary movements such as breathing, blood pressure and heart rate
• Parts of PNS

  • Sensory somatic
  • Autonomic
• somatic


  Under voluntary control (running, jumping)
• Autonomic


  Under involuntary control (breathin, heartbeat)
• Both autonomic and somatic systems of the PNS are connected to the CNS
• PNS links the CNS to the rest of the body
• Divisions of PNS

  • Sensory
  • Motor
• Sensory


  Carry information to the CNS
• Motor


  Carry information away from the CNS