Neurones: Difference between revisions
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[[Neurone|Neurones]] are specialised cells that conduct nerve impulses as tiny electrical signals<ref>Microglia Sculpt Postnatal Neural Circuits in an Activity and Complement-Dependent Manner.fckLRVolume 74, Issue 4, May 2012, Pages 691-705</ref>. There are three different types of neurone | [[Neurone|Neurones]] are specialised cells that conduct nerve impulses as tiny electrical signals<ref>Microglia Sculpt Postnatal Neural Circuits in an Activity and Complement-Dependent Manner.fckLRVolume 74, Issue 4, May 2012, Pages 691-705</ref>. There are three different functional types of neurone: | ||
The sensory (afferent) neurone can be subdivided into pseudo-unipolar and bipolar neurones. Pseudo-unipolar have an offset cell body and an axon that immediately splits into two. The neurone is mylinated to ensure faster propogation of action potential down the axon. Pseudo-unipolar is used in the somatic senses. Bipolar sensory neurones are used for smell and vision, the cell body is situated in the middle of the neurone with two axons forming from either side of the cell body. | |||
The motor (efferent) neurone which has the classic neurone structure; it is composed of a mylinated neurone that has large cell body at one end and axon terminal at the other. Motor neurones form synapses with effectors such as muscles or glands in order to control our response to internal or external stimuli.<br>The intermediate neuones of the CNS are commonly found in the brain. Due to the large amount of information recieved from sensory receptors they have a large dentritic tree which forms many sypatic connections. Both motor and interneuones of the CNS are multipolar.<br> | |||
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Revision as of 11:33, 18 November 2018
Neurones are specialised cells that conduct nerve impulses as tiny electrical signals[1]. There are three different functional types of neurone:
The sensory (afferent) neurone can be subdivided into pseudo-unipolar and bipolar neurones. Pseudo-unipolar have an offset cell body and an axon that immediately splits into two. The neurone is mylinated to ensure faster propogation of action potential down the axon. Pseudo-unipolar is used in the somatic senses. Bipolar sensory neurones are used for smell and vision, the cell body is situated in the middle of the neurone with two axons forming from either side of the cell body.
The motor (efferent) neurone which has the classic neurone structure; it is composed of a mylinated neurone that has large cell body at one end and axon terminal at the other. Motor neurones form synapses with effectors such as muscles or glands in order to control our response to internal or external stimuli.
The intermediate neuones of the CNS are commonly found in the brain. Due to the large amount of information recieved from sensory receptors they have a large dentritic tree which forms many sypatic connections. Both motor and interneuones of the CNS are multipolar.
Reference
- ↑ Microglia Sculpt Postnatal Neural Circuits in an Activity and Complement-Dependent Manner.fckLRVolume 74, Issue 4, May 2012, Pages 691-705