Nervous System

Nervous System Conus medularis Cauda equina Motor strip Sensory strip Broca area Sulcus Gyrus Wernicke area Cervical enlargement Lumbar enlargement Filum terminale Wernicke area, region of the brain that contains motor neurons involved in the comprehension of speech. Broca area, region of the brain that contains neurons involved in speech function. A blood brain barrier protects the brain by preventing many foregin substances in our vascular system from reaching the brain. Although sensations and feelings are processed in our brain, the brain itself cannot feel pain, as it lacks pain receptors. % of the total brain mass is water. It is the f attest organ in the body, contains billion nerve cells. The barriers does not work for some substances like Nicotine which rushes into the brain in mere seconds and Alcohol on the other hand takes minutes. The precentral gyrus is called as Motor Strip that controls the voluntary movements of the skeletal system. T he postcentral gyrus is called as Sensory Strip that controls the five senses — sight, smell, taste, tounch and hearing. The cardio- vascular center - controls the heart beat The respiratory center controls the rate and rhythm of breathing. The vomiting, coughing, and sneezing centres The Medulla Oblongata The Vital functional centres of medulla are: Hippocampus plays an important role in emotion, learning and memory. Amygdala plays role in aggression, eating, drinking and sexual behaviors. Hypothalamus - monitors blood levels of glucose, salt, blood pressure and hormones. Limbic Systems XI Std Biology-Zoology Chapter-