UNIT 1.1 + 1.2: Overview of NS

Environmental factors

experiences and exposures

Hereditary factors

come from genetics such as physical, mental, and behavioural

Central NS

Relays to the brain and spinal chord

Peripheral NS

Nerves branching off from spinal chord and brain-

Transmits info to and from CNS

(Peripheral NS): Auntonomic NS

Regulates glands, internal organs, blood pressure, etc

(Peripheral NS) (Auntonomic NS) : Sympathetic

Prepares body to react (fight or flight)

(Peripheral NS) (Autonomic NS): Parasympathetic

Maintains body functions, brings balance (rest and digest) back after Sympathetic (fight or flight)

(Peripheral NS): Somatic NS

Carries sensory info and controls movement of skeletal muscles

(Peripheral NS) (Somatic NS): Sensory (Afferent)

Carries messages from sensory receptors to CNS

(Peripheral NS) (Somatic NS): Motor (Efferent)

Carries messages from CNS to muscles and glands