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Dictionary » G » Ganglia

Ganglia

Definition

noun, singular: ganglion

(neuroanatomy) Mass of nerve tissue; a group of nerve cell bodies, especially nerve cells external to the brain or spinal cord.


Supplement

In vertebrates the ganglia are located outside the brain or spinal cord.

There are two major groups of ganglia:


Word origin: From Greek, cystlike tumor, nerve bundle.
Related forms: ganglial (‘’adjective’’)

Related terms:


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Re: Caffeine Coursework

... distributions. A1 receptors are widely distributed, and act to inhibit calcium uptake. A2A receptors are heavily concentrated in the basal ganglia, an area that plays a critical role in behavior control, but can be found in other parts of the brain as well, in lower densities. There is ...

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by red.ninja13
Sun Mar 22, 2009 7:39 pm
 
Forum: Human Biology
Topic: Caffeine Coursework
Replies: 3
Views: 864

How did the brain form?

It probably formed from nerves; see worm's ganglia/ganglion.

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by mith
Wed Mar 11, 2009 5:09 pm
 
Forum: Evolution
Topic: How did the brain form?
Replies: 6
Views: 708

If I only had a brain (Echinoderms)

Yes...often anything less than a clearly defined brain i.e. a vague agreggation of cells, is termed 'cerebral ganglia'. I remember a girl from the Ukraine once got in an argument with a teacher at the end of a class over this very topic...

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by kotoreru
Sat Jul 14, 2007 11:20 pm
 
Forum: Zoology Discussion
Topic: If I only had a brain (Echinoderms)
Replies: 1
Views: 918

A Monkey's Uncle

... and what developed was a rudimentary nervous system called a nerve net. over time parts of the nerve net have joined to form nerve chords and ganglia, never going backwards in this developement, always bigger and more centrated nervous systems, until you get to the mammals with their comparitively ...

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by AstusAleator
Mon Mar 19, 2007 9:51 am
 
Forum: Evolution
Topic: A Monkey's Uncle
Replies: 26
Views: 5282

A Monkey's Uncle

... small, then i say ok, has that development gone backwards from that point? ie. this includes brain size/efficiency, centration of nerves to form ganglia/chords. also, because i said mamals have comparitively enormous brains doesnt mean every mammal is concious to mans level. you know very well ...

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by narrowstaircase
Sun Mar 18, 2007 11:46 pm
 
Forum: Evolution
Topic: A Monkey's Uncle
Replies: 26
Views: 5282
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