Neuronal Pools
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16 terms
Terms | Definitions |
|---|---|
 wuat is a neuronal pool | functional groups of neurons that integrate incoming information from receptors which then forward processed information to other destingations functional groups of neurons that process and integrate information |
| name the zones of neuronal pool and explain | DISCHARGE POOL - those neurons that are closely associated with neuron of incoming signal, this is the one that is most likely to fire (either ExC or InH) as they have the strongest GRADED POTENTIAL FACILITATED ZONE - neurons furthur away from incoming fiber and do not reach threshold, but because of SUMMATION they are easier to depolarise than before because of the cumulative effects of Graded Potentials |
| what is the patters of synaptic connections in neuronal pools | circuits |
| circuits | pattern of synaptic connections in neuronal pools |
| name the types of neuronal circuits | DIVERGENCE (same pathway and multiple pathway) CONVERGING CIRCUITS (single source or multple source) REVERTEBRATING/OSCILLATING PARRALLEL AFTER DISCHARGE |
| name and briefly explain different neuronal circuits, also discuss their practicality DIVERGENCE AMPLIFYING CIRCUITS | DIVERGENCE AMPLIFYING CIRCUITS - one incoming fiver triggers responses in EVER INCREASING amount of neurons further and further along curcuit, so that one neuron from brain can activate hundreds of motor neurons and thereby thousands of motor units in skeletal muscle fibres can occur in single pathway (same pathway) or along several (multiple pathway) |
| me and briefly explain different neuronal circuits, also discuss their practicality CONVERGING CIRCUIT | where postsynaptic neuron receives input from several of its dendrites (can be InH or ExC), usuallly this is from multople different presynaptic neurons, or it can be from a single presynaptic neurons channeling signals to multiple dendrites has concentrating/funneling effect convergence from different areas explain how different types of sensory stimuli can have same ultimate effect or even a summation effect ie linking different senses like sight and sound and smell to associate it with a concep |
| me and briefly explain different neuronal circuits, also discuss their practicality REVERTEBRATING OSCILLATING CIRCUITS | incoming signals travel through chain of neurons, each of which makes collateral synapses with neurons in PREVIOUS part of pathway POSITIVE FEEDBACK, impulses are sent though circuit again and again giving continous output until a neuron in the chain does not fire involved in control of RHYTHMIC ACTIVITY ie sleep, breathing, arm swinging when walking |
| and briefly explain different neuronal circuits, also discuss their practicality PARRALLEL AFTER DISCHARGE SIRCUITS | similar to Convergence Circuit the difference is that there are many neurons inbetween the neuron that is firing and at the end it reaches a single neuron incoming fiber stimulates several neurons arranged in PARALLEL ARRAYS that eventually reach a single common output cell the impulses reach output cell at different times, creating bursts of impuleses called AFTER DISCHARGE that lasts for a longer time after initial input has ended as the signals are travelling though different routes they rach the final neuron at different times involved in conplex typesof mental processing |
| name and explain different types of neuronal processing | Serial - input travels along one pathway to a specific destination Parallel Processing - input travels along several different pathways to be integrated in different CNS regions |
| explain what serial processing is | a type of neuronal processing (serial or parrallel) where one neuron stimulates the next, eventually causing a specific anticipated response, these stimuli are dealt with INDIVIDUALLY these pathways trigger responses that are generally the same in everyone ie spinal relfexes and example comparing serial and parrallel stimuli is stepping on a sharp object, the serial response is to step off the object quickly, while the parralllel response is to complain or moveon or remove the object from the ground so no one else steps on it |
| reflex | rapid AUTOMATIC responses to stimuli |
| what pathways do reflexes occur over and name their components | reflexes occur over neural pathways called REFLEX ARCS the components include -Receptor - Sensory Neuron -CNS integration centre -Motor neuron -Effector |
| name components of reflex arc | -receptor -sensory neuron -CNS integration centre -Motor Neuron -Effector |
| describe parrallel processing | inputs are segregated into many pathways and information dilivered by each pathway is INTEGRATED SIMULTANEOUSLY at different parts of neural pathway for each person parallel processing triggers some pathways that are unique in every persn for example, the smell of something may trigger several responses ie remembering to buy something, or remembering a moment or event, remembering to do something and example comparing serial and parrallel stimuli is stepping on a sharp object, the serial response is to step off the object quickly, while the parralllel response is to complain or moveon or remove the object from the ground so no one else steps on it |
| what does suraface ectoderm form | neural tube and neural crest |
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