488 On the Nervous Systems of 
seat of sensation, volition and reason, which 
directly influences and is influenced by the im- 
material part of man, and which is by many 
writers named the Sensorium Commune, Seat of 
the Soul, and lately by Fourcroy Sensibilité Cen 
trale. There are few, if any parts of the ence- 
phalon, which have not upon: some occasion 
been injured or diseased without any remarkable 
diminution of the vital and mental powers. If 
any one part can with propriety be fixed upon, 
as entitled to this distinction, it should be a part, 
which cannot be injured without affecting sensa- 
tion, volition, &c, and which is found in all 
animals, that have a visible nervous system, 
The most constant part of the encephalon, ac- 
cording to M. Cuvier,* is the cerebellum. 
Haller thinks it not improbable,that the seat of the 
soulisin the beginning of every nerve and that 
the conjoined first origins of all the nerves con- 
Stitute the true sensorium commune. — “ Et 
denique per conjecturam non absurdam, ubj 
initium est nervi cujuscungue, ut omnium ner- 
the ventricles as the seat of the sensorium commune. 
He says ** Peculiare organum sensorii communis si ponere 
fas sit, vel si propria sedes sensorio communi in cerebro 
est, haud sine veri quadam specie hoc in humore queri 
debet.” Ibid p. 69, See also his Dissertation on the 
Organ of the Soul, Berol. 1796. 4. 
* Anat. Comparée Tome II, p, 109. & p. 1216 
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