Nervous System
→ Made up of the brain, spinal cord & an enormous network of nerves that thread throughout the body; it’s the control centre of the entire body.
→ The brain uses information it receives from the nerves to coordinate actions & reactions.
FUNCTIONS:
→ Sensory input: → Receiving information about the environment (e.g. cold, pain, movement etc.)
→ Integration: → Occurs in our central nervous system (CNS). The process of integration combines sensory perceptions & higher cognitive functions.
↳ Memories, learning & emotional response.
→ Motor response: → Once integrated, the nervous system produces a response on the basis of the stimuli perceived by sensory structures.
Nervous System
Central Nervous System (CNS) Peripheral Nervous System (PNS)
Brain Spinal cord Motor Neurons Sensory Neurons
Receives & processes sensory Conducts signals to and
information, initiates responses, CNS to muscles & Sensory organs to
stores memories, generates from the brain, controls glands. CNS.
thoughts & emotions. reflex activities.
Somatic Nervous System Autonomic Nervous System
THE BRAIN: Controls voluntary Controls involuntary responses.
→ Soft organ located inside and protected by the skull. movements.
↳ Main control centre of the body & contains 100 billion neurons.
→ As well, the spinal cord is part of the CNS; It is responsible for consciousness, memory, Sympathetic Division Parasympathetic Division
decision making and voluntary & involuntary contractions.
“Fight or flight”. “Rest or Digest”.
Cerebrum. -
Hypothalamus. -
Pituitary gland. -
Cerebellum.
. Brain stem.
-
Spinal cord.
→ The brain consists of 3 main parts:
→ Cerebrum: → Makes up 85% of the brain’s weight & is the thinking part of the brain.
↳ Controls voluntary muscles, problem solving, memory (long & short-term), reasoning & logic.
→ Cerebellum: → Located at the back of the head.
↳ Coordinates muscle movements voluntarily, maintains posture, balance & equilibrium.
→ Brain stem (medulla): → Controls movement of the eyes & mouth, relaying sensory messages (heat, pain & noise), respiration, consciousness, cardiac function
& involuntary muscle movements (sneezing, coughing, vomiting & swallowing).
→ As well as:
→ Grey matter (40%): → Contains most of the brains neuronal cell bodies.
↳ Conducts, processes & sends information to various parts of the body; fully develops in an individuals 20’s.
→ White matter (60%): → Made up of bundles which connect various grey matter areas.
↳ Interprets sensory information from various parts of the body.
g.
Grey matter. ↳
White@⑧
-)9}④π!. matter.
i
D
→ Made up of the brain, spinal cord & an enormous network of nerves that thread throughout the body; it’s the control centre of the entire body.
→ The brain uses information it receives from the nerves to coordinate actions & reactions.
FUNCTIONS:
→ Sensory input: → Receiving information about the environment (e.g. cold, pain, movement etc.)
→ Integration: → Occurs in our central nervous system (CNS). The process of integration combines sensory perceptions & higher cognitive functions.
↳ Memories, learning & emotional response.
→ Motor response: → Once integrated, the nervous system produces a response on the basis of the stimuli perceived by sensory structures.
Nervous System
Central Nervous System (CNS) Peripheral Nervous System (PNS)
Brain Spinal cord Motor Neurons Sensory Neurons
Receives & processes sensory Conducts signals to and
information, initiates responses, CNS to muscles & Sensory organs to
stores memories, generates from the brain, controls glands. CNS.
thoughts & emotions. reflex activities.
Somatic Nervous System Autonomic Nervous System
THE BRAIN: Controls voluntary Controls involuntary responses.
→ Soft organ located inside and protected by the skull. movements.
↳ Main control centre of the body & contains 100 billion neurons.
→ As well, the spinal cord is part of the CNS; It is responsible for consciousness, memory, Sympathetic Division Parasympathetic Division
decision making and voluntary & involuntary contractions.
“Fight or flight”. “Rest or Digest”.
Cerebrum. -
Hypothalamus. -
Pituitary gland. -
Cerebellum.
. Brain stem.
-
Spinal cord.
→ The brain consists of 3 main parts:
→ Cerebrum: → Makes up 85% of the brain’s weight & is the thinking part of the brain.
↳ Controls voluntary muscles, problem solving, memory (long & short-term), reasoning & logic.
→ Cerebellum: → Located at the back of the head.
↳ Coordinates muscle movements voluntarily, maintains posture, balance & equilibrium.
→ Brain stem (medulla): → Controls movement of the eyes & mouth, relaying sensory messages (heat, pain & noise), respiration, consciousness, cardiac function
& involuntary muscle movements (sneezing, coughing, vomiting & swallowing).
→ As well as:
→ Grey matter (40%): → Contains most of the brains neuronal cell bodies.
↳ Conducts, processes & sends information to various parts of the body; fully develops in an individuals 20’s.
→ White matter (60%): → Made up of bundles which connect various grey matter areas.
↳ Interprets sensory information from various parts of the body.
g.
Grey matter. ↳
White@⑧
-)9}④π!. matter.
i
D
