Dendrites Axon Axon terminal Cell Body Nucleus Myelin Sheath Node of Ranvier
Myelin Sheath Fatty tissue layer encasing the axons of some neurons Enables greater transmission speed as neural impulses hop from one s to the next Node of Ranvier: Space in between the myelin sheaths
Does the process of action potential send messages to other neurons? If so, how? If not, what does it do then?
What are the parts of the neuron? What does each part do? Action potential is getting messages from one end of neuron to the other
Like a wave: Electrical charge of cell goes up and down That up and down of charge pushes the message down axon
Now that the information is at the axon, it needs to be sent to another neuron Synapse: The Junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron
Each row will have 1 dendrite, 1 axon terminal; everyone else is in the axon Goal: to send down the most messages down the neuron Dendrite receives message from Mr. D Axon show the processes in the action potential Axon terminal shoots message into bin
Page #5 of notebook Yesterday we showed how synapse worked and how sometimes synapse is blocked. Using that information, how does Tylenol work with neurons?
Messages travel through the nervous system; this system is created by neurons In the neuron: dendrites listen, axon terminals talk Action Potential = message travels from dendrite to axon (SAME NEURON) Synapse = messages travels from one neuron to the other (OTHER NEURON)
Four Lobes Frontal Parietal (Par-riot-al) Occipital (Awk-sip-it-al) Temporal Each lobe has a specific function; neuron sends different messages to each
Color Brain before cutting Frontal: Blue Parietal: Green Occipital: Orange Temporal: Pink Page 3: Brown BE CAREFUL HOW YOU CUT; YOU DON’T WANT TO RUIN YOUR BRAIN!
Page #5 of notebook (continued) Finish this sentence: “The brain is like a _______.” Tell me why compared the brain in that way. Be creative.
Side 1: What lobe do you have? What does that lobe control? Where in the brain is it located? Side 2: Specifics about your case study OR What is going on in the disease?
Page #5 of notebook (continued) What are the four lobes and their functions?
Functions Hearing Understanding Language Memory
Functions Perceives visual information Sight, sights, and more sight Color blindness would start here
Functions: Received messages from senses Self-location Self-Orientation Sensory cortex
Functions: Consciousness and Personality Controls mood and emotional responses Judgments we make throughout day LAST PART OF BRAIN TO DEVELOP
Phineas Gage Railroad rod went through his face, damaging frontal lobe Before: Soft-spoken After: Irritable, profane, and dishonest
PART OF FRONTAL LOBE Motor Cortex Area that controls voluntary movements Electrical stimulus causes body to move