Lecture Notes: Neuron Model Overview

Introduction

• Presenter: Professor Long
• Focus: Neuron model, specifically page 31 from the course material.

Key Components of the Neuron Model

Soma

• Definition: The soma is the cell body of the neuron.
• Features:
  • Darker stained area around the nucleus.
  • Contains peri carry on and nucleus.

Dendrites

• Description: White branches extending from the soma.
• Function: Receive synaptic inputs from other neurons.

Axon Hillock and Axon

• Axon Hillock: Transition area between the soma and the axon.
• Axon: Conducts electrical impulses away from the neuron's cell body.
  • Axon is shown as an orange piece in the model.
  • Axial Plasm: Interior substance of the axon.
  • Axial Emma: Membrane covering the axon.

Schwann Cells

• Description: Cells wrapped around the axon.
• Function: Form the myelin sheath.
• Each layer of the Schwann cell membrane is called the Nuri lemma.
• Gaps between Schwann cells are known as Nodes of Ranvier.

Connective Tissue

• Endo Nerium: Connective tissue covering for neurons, similar to endomysium in muscles.
  • Located outside the myelin in myelinated neurons.

Synaptic Structures

T Load and Riaan & Synaptic Knob

• T Load and Riaan: Extensions involved in synaptic transmission.
• Synaptic Knob: Contains synaptic vesicles.
  • Vesicles store neurotransmitters.

Synaptic Transmission

• Presynaptic Neuron: The neuron transmitting the signal.
• Postsynaptic Cell: The neuron or cell receiving the signal.
• Synaptic Cleft: Small gap between the presynaptic and postsynaptic cells.

Conclusion

• Understanding of model should align with illustrations.
• Model provides insight into synaptic connections and cellular structures involved in neuron function.

• Note: Handling of physical model and camera work may have affected demonstration clarity.