TUMOUR IN THE LATERAL VENTRICLE. 
19 
the substance of the brain, very much resemble each other. 
Somnolency, frequent pulse, redness of the eyes and 
nostrils, pupils dilated, sometimes contracted, delirium, 
twitching of the muscles, or skin, or convulsion of the 
limbs; to these succeed a slow, full pulse, beating of the 
carotid arteries in the neck, slow stertorous breathing, 
profound coma, and the entire loss of volition. The fre¬ 
quent, hard pulse, redness of the eyes and nostrils, delirium 
and frenzy, are symptoms of inflammation of the mem¬ 
branes of the brain more than of the substance of the 
organ ; notwithstanding the faculties that are disordered in 
delirium are seated in the latter. 
Haemorrhage upon the periphery in the substance of the 
cerebral hemispheres, or in the ventricles, produces profound 
coma, slow pulse, stertorous breathing, relaxed state of the 
muscles of the extremities, dilated pupils, and blindness; 
lastly, suspension of all the vital functions of the body, and 
death. 
Collections of pus in the hemispheres, especially near the 
surface, produce the same results. 
Pus within the lateral ventricles, effusion, or tumours 
within these cavities, are attended with the same, but less 
severe manifestations. Effusions of blood, when slow, 
occurring upon, or within the cerebral hemispheres, effusions 
or tumours within the lateral ventricles, do not produce 
much functional disturbance in the brain, until the presence 
of these deposits create pressure and irritation ; and then the 
first phenomena resulting will consist of loss of the 
intellectual power in commanding and directing the instinc¬ 
tive desires; the power of standing steady, or walking 
without staggering forwards, or to one side; and as the depo¬ 
sits continue to increase, the effects are more serious, the loss 
of the faculties more manifest, and the symptoms of a more 
alarming and dangerous character. 
When the lobes of the cerebellum are the seat of haemor¬ 
rhage, effusions, tumours, or collections of pus, the results 
are much the same as those already described, except in the 
movements being backwards instead of forwards, and in the 
more rapid progress towards a fatal termination ; and as the 
morbid lesions descend towards the tuber annulare, the 
centre of the spinal system, the more rapid the progress 
becomes. Hardening or softening of the cerebral lobes, in 
the absence of congestion, diminishes the intellectual facul¬ 
ties, causes paralysis, or epileptical convulsions; and, when 
congestion is added, vertigo and coma are produced. Irrita¬ 
tion and pressure are the principal causes of all the pheno- 
