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Diseases of the Central Nervous System. In domestic animals diseases of the nervous system are not seen as commonly as are diseases of other systems

Part I

In domestic animals diseases of the nervous system are not seen as commonly as are diseases of other systems. However, symptoms in any way referable to the nervous system, occur frequently enough to be given careful consideration by the veterinary practitioner, especially from the standpoint of diagnosis. In contrast with the circulatory, respiratory or digestive systems the nervous system is nearly inaccessible to direct methods of physical examination. With the exception of the optic nerve head, which can be examined with the aid of the ophtalmoscope¹, the central nervous system is enclosed within the bony framework of the skull and vertebral column, and is completely removed from observation. Therefore, the practitioner is dependent for diagnosis on the interpretation of symptoms.

Different tumours have been found to occur in the central nervous system of cattle. Tumours which arise primarily from the brain, cord and meninges are somewhat rare in calle, probably, the most common tumour being that of lymphomatosis². In this condition there is often a tendency for lymphoid masses to invade the spinal canal. Having done so they exert pressure on the spinal nerves and roots, producing degenerative lesions in these organs.

¹ ophtalmoscope – офтальмоскоп, прибор для исследования глаз

² lymphomatosis – лимфоматоз

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