nervous system

sensory input

information sent to the brain/spinal cord from sensory receptors

motor output

commands sent from the brain/spinal cord to muscles or glands

central nervous system (CNS) contains

brain and spinal cord

Peripheral nervous system(PNS) contains

cranial and spinal nerves

Nodes of Ranvier

gaps in myelin that speed transmission

Fucntion of nuclues

controls cell activites

What are neuroglia

supporting neurons, regulate environment

Function of oligodendrocytes

form myelin in CNS

Function of Schwann cells

form myelin in PNS

Function of microglial cells

immune defense

temporal lobe function

hearing, memory

medulla oblongata fucntion

Controls breathing, heart rate

function of pons

Relays signals, helps control breathing

fucntion of thalamus

Sensory relay center

hypothalamus function

homeostasis (temperature, hunger, hormones)

pituitary gland function

“master gland” controls hormones(8)

Optic chiasma function

where optic nerves cross

3 meninges

dura mater, arachnoid mater, pia mater

4 protections of CNS

Skull, vertebrae, meninges, cerebrospinal fluid

“switch board”, all sensory impulses go through

thalamus

primary somatic sensory area (parietal lobe)

recieves impulses from the body’s sensory receptors

Primary motor area (frontal lobe)

sends impulses to skeletal muscles

Brocas area

involved in area to speak

C1-C3 injury

whole body paralyzed, breathing tube

C4-C5 injury

paralyzed from neck down

T6 injury

paralyzed from bottom chest down

L1 injury

paralyzed from hip down

occipital lobe function

vision