NUR 80A/B Lecture Notes - Lecture 3: Subdural Hematoma, Dura Mater, Perfusion
Document Summary
Modified monroe-killie hypothesis: if one or more of these components increase in size, intracranial pressure rises, and other components must accommodate: brain tissue (80%, blood (10%, csf (10%) Eeg changes: too much reduction of blood flow, cerebral metabolism changes. Figure 1 types of cerebral edema: acidosis, hypoxia, ischemia, herniation or displacement of brain tissue across tentorium or through foramen magnum, fatal d/t compression of the vagus nerve and medulla, herniation: death from brain stem compression. Ras: role in perceiving sensory information and regulating wakefulness and sleep-wake transitions: reticular formation: gatekeeper of sensory information, activates the hypothalamus. Flexion of arms, wrists, and fingers with adduction in upper extremities. Extension, internal rotation, and plantar flexion in lower extremities. d/t. All four extremities in rigid extension, with hyperpronation of forearms and plantar flexion of feet. Indicates a lesion in the brainstem at midbrain or upper pons . C, decorticate response on right side of body and decerebrate response on left side of body.
