HUMAN PHYSIOLOGY 



higher animals is raised into a number of folds or con- 

 volutions marked off from one another by fissures and sulci 

 (Fig. 94). 



The method of Golgi shows that the neurons in a typical 

 part of the cortex are arranged in the following manner 

 (Fig. 92) : 



FiQ. 94. A shows the chief convolutions on the outer aspect (front to right), and 

 B on the inner aspect (front to left) of a cerebral hemisphere. 



1. The incoming fibres pass right up to the surface and 

 end in dendrites (1). 



2. In this region are a set of small horizontal cells with 

 numerous processes (2). 



3. Underneath these are several rows of small pyramidal 

 cells sending dendritic processes to the surface and their 

 axons downwards (3). 



4. Below these are rows of large pyramidal cells similarly 

 arranged (4). 



