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nervous_system_and_neurons [2022/12/29 07:41] – rafaelnervous_system_and_neurons [2024/04/10 13:41] (current) – [Neurons in the brain] andrewtaustin
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 +{{tag>Anatomy}} 
 =======Overview the nervous system======= =======Overview the nervous system=======
  
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 {{:brain1.png?800|}} {{:brain1.png?800|}}
-{{:ns.jpg?400|}}+ 
  
 =====The Central Nervous system (CNS)=====  =====The Central Nervous system (CNS)===== 
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-=====Sensory neurons======+===Sensory neurons===
  
 Sensory neurons are the nerve cells that are activated by sensory input from the environment - for example, when you touch a hot surface with your fingertips, the sensory neurons will be the ones firing and sending off signals to the rest of the nervous system about the information they have received. Sensory neurons are the nerve cells that are activated by sensory input from the environment - for example, when you touch a hot surface with your fingertips, the sensory neurons will be the ones firing and sending off signals to the rest of the nervous system about the information they have received.
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 However, within any of these sensory or motor regions, there are tens or even hundreds of different types of neurons. In fact, researchers are still trying to devise a way to neatly classify the huge variety of neurons that exist in the brain. However, within any of these sensory or motor regions, there are tens or even hundreds of different types of neurons. In fact, researchers are still trying to devise a way to neatly classify the huge variety of neurons that exist in the brain.
  
-Looking at which neurotransmitter a neuron uses is one way that could be a useful for classifying neurons. +Looking at which neurotransmitter a neuron uses is one way that could be useful for classifying neurons. 
-However, within categories we can find further distinctions. Some GABA neurons, for example, send their axon mostly to the cell bodies of other neurons; others prefer to target the dendrites. Furthermore, these different neurons have different electrical properties, different shapes, different genes expressed, and different projection patterns and receive different inputs. In other words, a particular combination of features is one way of defining a neuron type.+However, within categories, we can find further distinctions. Some GABA neurons, for example, send their axon mainly to the cell bodies of other neurons; others prefer to target the dendrites. Furthermore, these different neurons have different electrical properties, different shapes, different genes expressed, and different projection patterns and receive different inputs. In other words, a particular combination of features is one way of defining a neuron type.
  
-This is really the purpose of trying to classify neurons: in the same way as we can say that spinal cord sensory neurons bring sensory input from the periphery to the central nervous system, we would like to be able to say that the role of ‘neuron X’ in the hippocampus is to (for example) let you distinguish between similar but slightly different memories.+This is the purpose of trying to classify neurons. In the same way as we can say that spinal cord sensory neurons bring sensory input from the periphery to the central nervous system, we would like to be able to say that the role of ‘neuron X’ in the hippocampus is to (for example) let you distinguish between similar but slightly different memories.
  
-So the answer to the question ‘What types of neurons are there?’ isn’t something we can fully answer yet. In the spinal cord, it is pretty simple. But part of what gives the brain its complexity is the huge number of specialised neuron types. Researchers are still trying to agree on what these are, and how they should be classified. Once we can do that, we’ll be in a good position to delve even deeper into how the brain operates.+So the answer to the question ‘What types of neurons are there?’ isn’t something we can fully answer yet. In the spinal cord, it is pretty simple. But part of what gives the brain its complexity is the huge number of specialised neuron types. Researchers are still trying to agree on these and how they should be classified. Once we can do that, we’ll be in a good position to look even deeper into how the brain operates.
  
 =====THE BRAIN===== =====THE BRAIN=====
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 At the base of the brain is the brainstem. It is important for breathing, blood pressure and how the body reacts to danger. At the base of the brain is the brainstem. It is important for breathing, blood pressure and how the body reacts to danger.
 {{:brain.jpg?400|}} {{:brain.jpg?400|}}
 +
 +=====Relationship between the CNS and the Limbic System =====
 +
 +{{:ls.jpg?400|}}
 +
 +  * Thalamus: Telephone exchange, all sense information less smell come here. It redirects the information to the relative areas. 
 +  * Hypothalamus is involved in the “hungers” and the “drives”
 +  * Hippocampus: highly involved in memory
 +  * Amygdala: Highly involved in emotional discrimination (Fight or flight response, trauma...)
 +
 +For more info inthe Limbic system:
 +
 +https://integraleyemovementtherapy.wiki/limbic_system
 +
 + 
  • Last modified: 2022/12/29 07:41
  • by rafael