week 1 neurons

This week we discussed the anatomy of a neuron, types of neurons, and how they send and receive electrochemical signals. The three different structural types of neuron are unipolar (sometimes called pseudounipolar), bipolar and multipolar. A neuron has three categories of potential; resting potential, graded/local/receptor potential, or action potential. For a neuron to go from resting to graded potential a neurotrasmitter must bind to a dendrite. This allows Na+ ions to trickle into the neuron. if the signal is strong enough and the ICF reaches -55mv the neuron will reach action potential. This causes the axon hillock to open up and allow a massive rush of Na+ ions in, that flow down the axon. The positive charge causes the permeability of the synaptic bulb to change allowing an influx of calcium ions. the calcium causes the synaptic vessels to move to the membrane and burst, releasing neurotransmitters into the synaptic cleft. These NT then bind to another neuron. This process is responsible for all your bodies perceptions, behaviors, memories, and movements.
For the last year or so I have noticed pain, tingling, and loss of strength in my hands when I am on the computer or doing a lot of writing. I was aware that it was the beginning of carpal tunnel syndrome but didn't know what was the actual cause of the pain and loss of strength. after reading the text I now know its due to the myelin sheath being damaged or the nerves being squeezed and irritated. I try to remember to stretch my hands every now and then while i am working but I usually forget until they start to hurt. The stretching does help and if I do it regularly my hands will return to normal.