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Lecture 03.docx

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Zachariah Campbell

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Lecture 03- Human Brain and behavior - Functional divisions of the nervous system: autonomic nervous is the flight or fleet system - The brain itself, like the rib cage is there to protect the content and more so if you cause an insult to the brain and if you hurt the brain then you suffer some sort of significant injury. The skull helps us protect the brain from injury and it is intricate. The ménage’s and covers the brain and spinal cord and continuous for one another and the median through which it removes the waste from the brain - CNS: largely does cushion the brain and provides buoyance if you take the brain out of the cranial they have something run through their body and the brain will flatten on gravity and with the fluid it is in the form it is found in, Hydrocephalus: common thing that happens with the ventricular system, the ventricles are blocked and fluid cannot move down, “water on the brain” it happens during developmental phase or during injury and the pressure will impinge on surrounding brain tissue and can cause symptoms in the person and - PNS: outside the protected case and the cranium, part of the nervous system it affects our environment back and forth and it is continuous of CNS and it is both continuous of one another - If you cut the brain you have two arteries coming up, where the arteries come up they branch off in 3 ways. Providing collective profusion that requires tremendous energy to run - Neurons : the basic block of nervous system is the neuron, and about glia and how important they are, the neurons and glia and the stem cells are undifferentiated they could become neuron and glia and they develop from stem cells and they are primitive cells and blast themselves can develop into neurons of glia - Diagram of the cells and break up into blasts and In the bottom you see the neurons and there is interneuron in spinal cord, and the projecting neuron found in the brain and the oligodendroglia found in the CNS and the brain and also in the astrocyte found in the CNS and brain. Have different characteristics and it is important to remember there is something simple proliferating into something more complicated - Sensory neurons two types bipolar and soma and interneuron is link up sensory and any sort of reflex that is instantaneous not exacerbated by the brain - Sensory neurons: bipolar and there is the cell body and you have an axon and dendrite (named based on its morphological base) and beside it is a somatosensory neuron that intervenes the skin and muscle, and it is intricate and it has to travel a lot of distance to connect to spinal cord. And interneurons and the stellate cell and it is very detailed dendrites and the pyramidal cells and they have dendrites as well with axons leading out and affecting the muscles and the 3 ones is weir looking and very preliterate and then motor neurons and many different shapes and sizes and keeping with their functional locations - 5 different types of glial cells * don’t know what they all do but know the types, and focus on olgo and Schwann cells and provide and insulate some axons and allows for some function. *The different between O and S is that one O is only in the central nervous system in the brain and spinal cord and the S are found in the peripheral nervous system. But they both have the same function but different aspects in the nervous system - Looking at human brain and cutting into faces you can see the through the naked eye there is different consistency and color in them. - GRAY MATTER: mixture of different things and formed by cell bodies of neurons and the brain uses most of the glucose energy and relate to the rest of the energy and you have to have the blood supply mapped onto where it is needs it which is on the cell body - WHITE MATTER: formed from the insulated axons(which are insulated by olgo and Shwann cells), and they are covered in the this - RETICULAR MATTER: not grey or white but a mix - Along the brain stem there is reticular matter from the diagram and the second sigram is staining from colonal cut and the grey matter the cortex is stained etc., and right hand side there is staining of white matter and keeping with fact that grey matter is not stained and white matter is strained - Layer, Nuclei, Nerves, and tracts: GRAY matter can be divided up into layers or nuclei, like in the cortical region where is the surface of the brain we have layers of the brain cells that are downward and upward connected and cell bodies. Common nuclei are basil and Gallia and cell bodies involved in similar function. Globular like a in an epic entre in a concentrated place. - Tracts: within the brain white matter pathways or bundles of axons travelling in different directions and looking at diagrams of brains you will see the optic system that’s exposed. Continuous physical structures. - Look at diagram and understand overall basic development. Looking at beginning it is a fluid filled space and as it develops and it starts to differentiate within the front and allows for differentiation of cell that are cortical and not cortical. Don’t know the details. - Progressive development in the neural tube - Ventricles: very intricate in its final form. Continuous with the spinal cord. The spinal canal is a thi
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