1 00:00:04,209 --> 00:00:09,210 The human brain is the command center for the human nervous system. 2 00:00:09,210 --> 00:00:15,210 It receives input from the sensory organs and sends output to the muscles. 3 00:00:15,210 --> 00:00:19,210 The human brain has the same basic structure as other mammals' brains, 4 00:00:19,210 --> 00:00:26,890 but is larger in relation to body size than any other brains. 5 00:00:26,890 --> 00:00:33,890 The human brain is the largest brain of all vertebrates relative to body size. 6 00:00:33,890 --> 00:00:38,149 It weighs about 1.5 kg. 7 00:00:38,149 --> 00:00:44,789 The brain makes up about 2% of a human's body weight. 8 00:00:44,789 --> 00:00:49,750 The cerebrum makes up 85% of the brain's weight. 9 00:00:49,750 --> 00:00:55,450 It contains about 86 billion nerve cells, neurons. 10 00:00:55,450 --> 00:01:00,469 It contains billions of nerve fibers, axons and dendrites. 11 00:01:00,469 --> 00:01:15,870 These neurons are connected by trillions of connections, is located within the head. 12 00:01:15,870 --> 00:01:28,930 The larger structures of the brain are the cerebrum, brain stem and cerebellum. 13 00:01:28,930 --> 00:01:35,549 The cerebrum is a large part of the brain containing the cerebral cortex. 14 00:01:35,549 --> 00:01:42,549 well as the hippocampus, basal ganglia and olfactory bulb. 15 00:01:42,549 --> 00:01:47,790 In humans, the cerebrum is the uppermost region of the central nervous system. 16 00:01:47,790 --> 00:01:53,310 Depending upon the position of the animal it lights, either in front or on top of the 17 00:01:53,310 --> 00:01:54,310 brainstem. 18 00:01:54,310 --> 00:02:00,109 In humans, the cerebrum is the largest and best developed of the three major divisions 19 00:02:00,109 --> 00:02:01,849 of the brain. 20 00:02:01,849 --> 00:02:07,530 The cerebrum is the newest structure in the phylogenetic sense and in mammals it is the 21 00:02:07,530 --> 00:02:11,849 darkest and most developed out of unknown species. 22 00:02:11,849 --> 00:02:17,689 The brainstem is the posterior parts of the brain, structurally continuous with the spinal 23 00:02:17,689 --> 00:02:19,129 cord. 24 00:02:19,129 --> 00:02:25,349 The brainstem includes the midbrain, the pons and the medulla oblongata. 25 00:02:25,349 --> 00:02:31,990 The brainstem provides the main motor and sensory innervation to the face and neck via 26 00:02:31,990 --> 00:02:33,789 the cranial nerves. 27 00:02:33,789 --> 00:02:39,349 This is an extremely important part of the brain as the nerve connection of the motor 28 00:02:39,349 --> 00:02:44,009 and sensory system from the main part of the brain to the rest of the body pass through 29 00:02:44,009 --> 00:02:45,810 the brainstem. 30 00:02:45,810 --> 00:02:51,789 The brainstem also plays an important role in the regulation of cardiac and respiratory 31 00:02:51,789 --> 00:02:52,789 function. 32 00:02:52,789 --> 00:02:56,789 It also regulates the central nervous system. 33 00:02:56,789 --> 00:03:01,789 The cerebellum is a major feature of the hindbrain, of all vertebrates. 34 00:03:01,789 --> 00:03:07,789 In humans, the cerebellum plays an important role in motor control, 35 00:03:07,789 --> 00:03:12,789 and it may also be involved in some cognitive functions, 36 00:03:12,789 --> 00:03:18,789 such as attention and language, as well as in regulating fear and pleasure responses. 37 00:03:18,789 --> 00:03:24,789 It contributes to coordination, precision and accurate timing. 38 00:03:24,789 --> 00:03:30,789 It receives input from sensory systems of the spinal cord. 39 00:03:30,789 --> 00:03:37,789 In this image we can see what part of the brain controls each part of our body. 40 00:03:37,789 --> 00:03:58,750 The main parts are feet, leg, knee, hip, trunk, elbow, wrist, hand, ring finger, middle finger, index finger, thumb, nape, eye muscles, face, lips, cheek, tongue, pharynx and larynx. 41 00:04:01,400 --> 00:04:07,360 In our sport, gymnastics, we have to think twice what are we going to do and be very concentrated. 42 00:04:07,360 --> 00:04:15,759 That's why when we are going to do a difficulty we are very serious and we take some seconds 43 00:04:15,759 --> 00:04:35,009 before doing it. 44 00:04:35,009 --> 00:04:39,470 When you are short on one part of the head you can die or not. 45 00:04:39,470 --> 00:04:44,709 When you die is because the brain also die and all the organs of your body, including 46 00:04:44,709 --> 00:04:47,110 the heart, stop working. 47 00:04:47,110 --> 00:04:53,129 It gets two seconds until you die, if you survive you couldn't remember anything.