Summary FLG211 Study unit 3-5

SECTION 3:
NEUROPHYSIOLOGY
Study Unit 3.1 to 3.6




Action potentials, or nerve impulses, are electrical impulses carried along the length of axons


input output
integration
signal signal

Changes in Membrane Potential
- The potential difference (70 mV) across the membrane of a resting neuron
- Changes are caused by three events:
1. Depolarization, the inside of the membrane becomes less negative
2. Repolarization, the membrane returns to its resting membrane potential
3. Hyperpolarization, the inside of the membrane becomes more negative than the resting potential

,Action Potential Stages: Overview

,
, Frequency of action potentials




Fundamentals of the Nervous System and Tissue
Nervous system
The master controlling and communicating system of the body

Functions

- Act as sensory input monitoring stimuli occurring inside and outside the body
- Responsible for the integration and interpretation of sensory input
- Responsible for motor output response to stimuli by activating effector organs

Afferent and Efferent CNS connections



Sensory signs Motor NS



Afferent Efferent
CNS
Visceral/Autonomic
sensors Autonomic NS