With all the other things we do, are you surprised that the brain is responsible for your emotions? Maybe get the toy you wanted for your birthday and you're very happy. Or your friend is sick and you feel sad. Or your little brother you have the messy room and are very angry! Have you ever wondered where they come from those feelings? All come from the brain that controls all the emotions you feel.
The brain has a small group of cells on each side called the amygdala. The word "amygdala" comes from the Latin word for "nuts" and that is the aspect that has this area. Scientists believe that the tonsils are responsible for emotions. So when you're sad about a friend who moves, your tonsils are working hard. But not everything that makes the amygdala is bad - also makes you feel excited when you win your soccer game.
It's normal to feel all sorts of emotions, good and bad. Sometimes you can feel a bit sad and ask why. And sometimes you can feel scared, silly or happy. These feelings are part of what makes us human
Location of emotions and brain
The hypothalamus
Last but not least, the hypothalamus, which is right in the center of your brain, in the midst of the action. The hypothalamus is like the thermometer of your brain. Know what your body temperature should be (about 98.6 degrees Fahrenheit or 37 degrees Celsius) and transmits messages that tell your body whether to sweat or shiver. Why? Heat and sweat when you have a cold shiver when it is the manner in which your body tries to maintain constant temperature - irrespective of what they're doing or the external temperature. Do you remember the last time you ran and sudaste much? Your hypothalamus was able to realize that your run temperature was rising by so much and sent a message to your skin so that sudara. When you start to sweat, your body began to cool.
Spinal Cord
•The spinal cord is the part of the central nervous system that is surrounded and protected by vertebral column.
•In cross section, the spinal cord is organized as a butterfly shaped mass of gray matter surrounded by white matter.
•Gray matter of spinal cord are designated as name or romen numeral.
•The neuron cell bodies are organized into three discrete areas of the gray matter: the dorsal horn, the intermediate zone, and the ventral horn
•The CNS is made up not only of the brain, but also the spinal cord.
•The spinal cord is a thick, hollow tube of nerves that runs down the back, through the spine.
•The ventral horn contains the motor neuron bodies for the somatic motor system.
•The white matter contains many sensory tracts ascending to the brain and motor neuron axon descending from the brain
Supporting Cells of the PNS:
1. Schwann cells are the supporting cells of the peripheral nerves. One Schwann cell may envelop segments of several unmyelinated axons or provide a segment of a single myelinated axon with its myelin sheath. Each myelinated axon segment is surrounded by multiple layers of a Schwann cell process with most of its cytoplasm squeezed out; the remaining multilayered Schwann cell plasma membrane, called myelin, consists mainly of phospholipid. The gaps between the myelin sheath Se8ments are the nodes of Ranvier. Ovoid or flattened Schwann cell nuclei lie peripheral to the axon they support. They are usually more euchromatic than the nuclei of the fibrocytes scattered among the axons.
2. Satellite cells are specialized Schwann cells in craniospinal and autonomic ganglia, where they form a one-cell-thick covering over the cell bodies of the neurons (ganglion cells). Their nuclei are spheric with mottled chromatin. In sections, the nuclei typically appear as a "string of pearls" surrounding the much larger ganglion cell bodies.
Subsystems of the Nervous System
ØD. Subsystems of the Nervous System: The nervous system is divisible into 2 overlapping pairs of subsystems:
Ø1. The central and peripheral nervous systems are defined mainly by location. The central nervous system (CNS) includes the brain and spinal cord. The peripheral nervous system (PNS) includes all other nerve tissue. 2. The autonomic and somatic nervous systems are defined according to function, but have distinctive anatomic features as well.
Each has CNS and PNS components. The autonomic nervous system controls involuntary visceral functions leg, glandular secretions, smooth muscle contraction) and has both motor and sensory pathways, although some authors exclude visceral sensory pathways from the ANS. Each motor pathway consists of 2 neurons that synapse in a peripheral autonomic ganglion. The cell body of the first (preganglionic) neuron is in the CNS; the cell body of the second (postganglionic) neuron is in the autonomic ganglion. The cell bodies of the sensory neurons are located in craniospinal ganglia and have processes that extend peripherally.
The ANS is subdivided into the sympathetic and parasympathetic nervous systems. When they innervate the same end organ, sympathetic and parasympathetic nerves usually have opposing effects. The somatic nervous system includes all nerve tissue except the ANS. It controls somatosensory perception leg, touch, heat, cold) and somatomotor (voluntary) functions (eg, skeletal muscle contraction). Acetylcholine is the most common somatic neurotransmitter.
