404 



ANATOMY FOR NURSES 



[Chap. XIX 



Speed 

 Nerve- 

 impulse 



of 



Afferent fibre — 140 ft. per second. 

 Efferent fibre — 110 ft. per second. 

 Light — 186,000 miles per second. 

 Sound — 1100 feet per second. 



Cell-bodies. 



Varieties 

 of Nerve < 

 Tissue 



Gray 

 matter 



White 

 matter 



Nerve- 

 trunks 



Dendrites. 



Commencement of axones. 

 Collaterals. 

 ( Brain. 

 < Spinal cord. 

 I Ganglia. 

 Consists of medullated nerves. 

 Brain. 

 Spinal cord. 

 Ganglia. 

 Nerve-trunks. 



Neuroglia — Special tissue found in brain and spinal cord — 

 function — support. 



Consists of ' 



Found in 



Found in 



Consist 

 of 



Func- 

 tion is 

 connec- 

 . tion of 



Bundles of nerve-fibres bound together to make 



funiculi. 

 Funiculi bound together to make nerve-trunks. 

 Connective tissue surrounds funiculi and nerve- 



trimks. 



1. Different parts of nervous system. 



2. Nerve-centres and the viscera. 



3. Nerve-centres and the periphery. 



4. Viscera and the surface of the body. 



Nerve- 

 centres 



Vertebral 

 Ganglia 



■ Groups of nerv^e-cells exercising control over some definite 

 function. 

 Loca- j Brain, 

 tion 1 Spinal cord. 



Ganglia — Collection of nerve-cells. 



( Twenty-four on either side of spinal column. 

 Number ^ ^ . , , , 



I One in front of coccyx. 



1. With each other by ganglia cords. 



2. With spinal nerves by rami communicantes. 

 a. Pass directly to viscera. 



Con- I [ Great splanchnic. 



nected 1 3. With b. Converge to form < Small splanchnic. 



viscera I I Least splanchnic. 



c. Join collaterals and plexuses. 



d. Join spinal nerves. 



