PSYB45H3 Lecture Notes - Lecture 2: Radial Glial Cell, Peripheral Nervous System, Neuroglia
Document Summary
Astrocytes: firstly, they are star like structures, previously known as radial glial cells that create bridges for neurons to build which is important for neurodevelopment. Secondly, they also form the blood brain barrier, which regulates and protects the brain from substances entering it. Lastly, they secret hormones and other substances to help sustain brain injuries: microglia: are the scavengers of the nervous system. They eliminate dead/dying neurons to prevent contamination that would prevent healthy neural function: oligodendrocytes: found in the brain and spinal cord and they insulate (myelin) neurons in order to speed up neurotransmission, peripheral nervous system contains schwann cells. Shwann cells: found in neurons below the brain and spinal cord (pns) and they insulate (myelin) neurons to speed up neurotransmission. Neurons: 86 billion neurons serve as the communicative unit: motor neurons, sensory neurons and. Interneurons: they vary in structure depending on function, motor neurons: carry motor information to move your body.
