PSYB65H3 Chapter Notes - Chapter 14: Trisomy, Perinatal Asphyxia, Visual Cortex
Document Summary
A tumours/neoplasms ( new tissue ) is a mass of new and abnormal tissues that is not physiologically beneficial to in surrounding structures. Some neurological texts describe tumours as space-occupying lesions, meaning that they are foreign objects that cause damage to the cns by putting pressure on it and occupying space that is normally occupied by the cns. Other types of tumours damage the surrounding tissues in ways other than exerting pressure. Benign tumours are not likely to recur; malignant tumours are more likely to recur. Tumours arising from glial cells: the most common types of tumours are gliomas, tumours that arise form glial cells y there are 2 main types: astroctyes are tumours that arise from the growth of astrocytes. some astrocytes are relatively well encapsulated; the damage comes from compression of the surrounding tissues. the prognosis of removal surgically is good, provided the tumour started to grow in surgically accessible place.
