476 INTERNAL STRUCTURE OF HUMAN ERAIN. 



develo])ed system, though it also holds relations to the 

 Spinal Cord closely resembling those which exist between 

 the two ' Cerebral Systemic Nerves,' and the Medulla. 



By the arrangements above described, not only is the 

 harmonious activity of related Viscera facilitated, but the 

 simultaneous activity of Visceral and Cerebro- spinal Nerve 

 Centres is ensured, where such conjoint activity is needed 

 • — as in the respiratory processes, in oviposition and in 

 parturition, or in the voiding of excreta. Again, by reason 

 of the direct or indirect connection of the Viscera with 

 the Brain, the organic states of the various organs are 

 capable of influencing the 'temper' or mental state of the 

 individual, either unconsciously or consciously. Visceral 

 states may, independently of their conscious realization, 

 prompt to automatic or Instinctive Acts ; or, they may im- 

 press themselves upon the Conscious Life of the individual, 

 and lead more or less directly to a series of Voluntary 

 Actions. 



