Occipital lobe syndrome

Occipital lobe syndrome Occipital lobe tumors are rare. Visual disturbances are one of the most important signs of tumors at this level. Visual field deficits occur through direct damage or ridged area of optical radiation. Visual field changes are found in almost all patients and is manifested in the form of hemianopsia homonima controlaterala (being affected and the macular), visual field deficit and hemianopsia in cvandrant crescent. When the tumor develops from the inside of the skull compressing the convex side of the occipital lobe, then gradually increases in field hemianopsia homolateral nasal and temporal field opposite. Quadrant hemianopsia in the tumor of interest occurs when the upper or lower face scizurii calcarine. If you are interested in the projection areas of vision, bilateral cortical blindness occurs when (the patient does not see). In cortical blindness are normal eyeballs are not affected, blindness resulting from damage to nerve center for processing visual information. In occipital lobe tumors, cortical blindness occurs slowly, especially if it is a meningioma (it evolves slowly over a period of years). If starts suddenly, then the most likely cause is the rupture of a vessel occipital area. An interesting feature of cortical cecitatii is that sick people do not realize this and neglect the appearance, on the one hand because it occurs slowly, on the other hand because it violated the very heart of visual perception. Cortical blindness in some patients resume to lack of perception of certain colors (especially in the left occipital lesions). The left occipital lobe lesions and still meets or prosopagnozia visual agnosia (inability to recognize faces of known persons). If extensive bilateral lesions meets Balint's syndrome, an illness that visual attention disorders, optic ataxia (the patient can not touch the subject of fixed gaze) and paralysis of psychic vision. Visual hallucinations are more rare. During the state is completed by symptoms of intracranial hypertension syndrome, which enhances the visual disturbances and malaise. Intracranial hypertension syndrome may also dominate the clinical picture, making it difficult occipital lobe tumor diagnosis based on clinical signs only.
Occipital lobe tumors longer clinically manifested by disorders of speech, if interested and parietal lobe tumor. Mental disorders is a decrease in cognitive ability, short-term memory, feelings of euphoria alternating with depression, loss of interest in everyday events.
Epileptic manifestations are diverse and can be manifest by seizures, or petit grand shopping mall, Jacksonian seizures. In case of concomitant lesions in the hypothalamus or crises arise and sphincter disorders narcolepsy.
In the final stage of the disease, when tumors reached large disturbances occur and even cerebellar motor disorders, cerebellar hemisphere when the tumor presses on the underside. Motor disorders manifest as a controlaterala hemiparesis and cerebellar disturbances take the form of balance disorders essentially of bulk.