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Supplemental Modules (Anatomy and Physiology)
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- Animated Heart
- Cardiac Cycle
- Cervical Verebrae
- Cortical atrophy in Alzheimer’s Disease
- Alzheimer’s disease is a neuro-degenerative medical condition, leading to dementia. There is substantial atrophy of cortex in patients with Alzheimer’s Disease, associated with loss of sulci and gyri in the parietal lobe and temporal lobe, and parts of the cingulate gyrus and frontal cortex. Alzheimer’s Disease is a progressive disease, which means it gets worse as days pass by. The most common symptom is short term memory loss.
- Nerve Damage
- In a condition called Guillain-barré Sydrome(or GBS), there is antibody mediated damage to the schwann cell. The antibodies are like soldiers, which fight against intruders in the body. But in this condition(and various other autoimmune conditions), the soldiers start killing civilians instead of the intruders. This happens because the immune system incorrectly labels them as terrorist(very common in outside world also).
- Neurons are specialized cells which transmit impulses throughout the body. They are like wires within the body, which form a network - The Nervous system. The brain, the ganglia within the brain, the spinal cord, all the nerves in the body are all formed from individual nerve cells. They not only respond to touch, sound, light, pain, temperature and other stimuli, they also control various outputs from the body.
- Neuro Muscular Junction
- If you think of nerves as long, thin wires, then by stretching the metaphor, a neuro muscular junction can be considered as the latest wireless technology. Its like a wifi router, which converts the wired signal into wireless ones so that your phone or laptop in which you are reading this article can understand that.
- Saltatory Conduction
- Not all neurons are created equal. Some neurons are fast and some are not so. The speed of a neuron is very important in a an evolutionary point of view, because when a lion is trying to hunt you down, you better think fast and run fast. So some neurons are covered by a sheath. The Schwann cells form this sheath and they help in fast conduction of impulses across the nerve.