Neuroscience: Expert Guides and Resources

Neurobiology has all kinds of real-world (and not so real-world) applications. From curing paralysis to the possibility of cyborgs, neurobiology has answers to many fascinating questions this Cheat Sheet addresses.How can paralysis be cured?Paralysis has multiple causes. The part of the brain that controls movement can be damaged, such as from a stroke.

Although not located in the skin, receptors mediating proprioception (position sense) and kinesthesis (movement sense), are either free nerve endings or structures similar to mechanoreceptors like Ruffini corpuscles (refer to the first figure below) and have similar layouts as the cell bodies in the dorsal root ganglia (refer to the second figure).

Why is Neuroscience important? The most complex structure in the world is the 3-pound mass of cells within your skull called the brain.The brain consists of about 100 billion neurons, which is about the same number as all the stars in our Milky Way galaxy and the number of galaxies in the known universe. It also contains about a trillion glial cells, which contribute to the proper function of neurons.

Although pain is a necessary function for preventing damage to the body, in some cases, pain itself becomes disabling. Chronic pain can occur in disease conditions such as cancer, in which case the normal function of pain that forces you to rest, protect, or not use some injured part of the body until it heals is simply inappropriate in a disease state in which destruction is occurring from the cancer all over the body that cannot be healed from rest.

Knowing the four lobes of the brain is important for neuroscience. The neocortex is divided into four major lobes: the frontal lobe, the parietal lobe, the temporal lobe, and occipital lobe. These lobes are further divided into different regions. The frontal lobes are involved with control of movement, from stimulation of individual muscles to abstract planning about what to do.

The mapping of skin receptors to a specific area of neocortex illustrates one of the most fundamental principles of brain organization, cortical maps. The projection from the thalamus is orderly in the sense that receptors on nearby parts of the skin project to nearby cortical neurons. The figure shows a representation of the skin map on the somatosensory cortex.

Mental illness can clearly occur in a genetically normal brain which has suffered organic damage during development or later. It can also arise from trauma or stress that leads to indirect changes in the brain from factors like chronic stress or sleep deprivation.Well-known environmentally generated brain dysfunctions include the following: Fetal alcohol syndrome: Fetal alcohol syndrome develops when the mother drinks excessive alcohol during pregnancy.

The autonomic nervous system. It has sensory, motor, and gland-stimulating components. The key components of the central nervous system are the brain and spinal cord. But when it comes to nervous systems, your body has more than just these two.The autonomic nervous system resides outside the central nervous system and controls not voluntary muscles as the peripheral nervous system does, but the heart, glands, and organs with smooth muscles (not under voluntary control) such as the intestines.

The neurotransmitter "juice" squirted from the presynaptic to the postsynaptic neuron consists of neurotransmitter molecules. A variety of different types of neurotransmitters exist, each varying in its type of effect and time course on the postsynaptic cell. Neurotransmitters are grouped into three major functional classes: Fast, excitatory neurotransmitters: The most important neurotransmitters are the fast, excitatory neurotransmitters glutamate and acetylcholine.