Types of Neurons

Sensory Neurons

Carry impulses from the body to the CNS

Interneurons

• Receive input from sensory neurons

• Found within brain and spinal cord

• Can organize all messages they receive before communicating with motor neurons

Motor Neurons

Carry impulses from the CNS back to specific regions of the body

When someone taps you on the shoulder

• Receptor on skin notices change has happened

• Sensory neurons take message to CNS

• Interneurons in the brain read the message

• Motor neurons send messages from your brain to your neck

  muscles

• Neck muscles activate from the message which cause head to turn

When you are writing and reading information

• Action potentials carry information about the words on the page

• Neurotransmitters are diffusing across the synaptic cleft

• Motor neurons in your brain will send out action potentials to the muscle cells of your eyes

Cranial Nerves

• Originate in the brain

• Usually end up in structures in your hand and upper body

Spinal Nerves

• Originate in the Spinal cord

• Extend to parts of the body that are below our head