Which scientist became infamous for studying sensory nerve regeneration by experimenting on himself?

The Nobel Prize in Physiology or Medicine is given for discoveries deemed particularly important in the fields of physiology or medicine.  In 1906, this award was given to two biologists for their groundbreaking work in the field of neuroanatomy.  Despite using the same technique to visualize neurons, the two biologists formed opposing theories regarding organization of the nervous system.Hypothesis 1:  Reticular TheoryBiologist 1 developed a neural staining technique that was carried out by fixing brain tissue from older animals with primarily myelinated nerve fibers in potassium dichromate (K2Cr2O7) before treating this tissue with silver nitrate (AgNO3).  A silver chromate (Ag2CrO4) precipitate deposited within the neurons, making them appear black.  This silver impregnation method was revolutionary because of two features.  First, only a random subset of neurons within a given tissue sample (~1% of the total cell population) was subject to silver impregnation.  Second, the impregnated cells were stained in their entirety, allowing for visualization of the complete neuron.  Biologist 1 concluded that his findings supported the idea that the nervous system is a single reticulum of fused neural processes that transmit information via cytoplasmic continuity.Hypothesis 2:  Neuron DoctrineBiologist 2 modified the silver impregnation method by first subjecting the brain tissue to two rounds of staining ("double impregnation") rather than one.  Where Biologist 1 studied the brain tissue of older animals with myelinated nerve fibers, Biologist 2 employed the silver stain on brain tissue from younger animals, which made it easier for the silver to impregnate the neural processes due to a relative lack of myelination.  Biologist 2 reasoned that the nervous system is not a single web of interconnected fibers but rather is made up of discrete neural units that communicate via close, but not continuous, contact.The neuron doctrine was later proven correct with the advent of electron microscopy, which allowed scientists to visualize the synapse (ie, the point of communication between two distinct neurons).  Further investigation allowed researchers to ultimately discover that there are two types of synapses:  electrical and chemical. Question 43Which of the following synaptic events would likely contribute most directly to the generation of an action potential in a postsynaptic neuron?A.The presynaptic neuron releases large quantities of gamma-aminobutyric acid (GABA).B.Postsynaptic neurotransmitter-gated Na+ and Ca2+ channels open.C.Neurotransmitter reuptake into the presynaptic cell and surrounding glia is increased.D.Neurotransmitter binding activates G protein–coupled receptors on the postsynaptic membrane.

Which scientist is credited with the discovery of cells by observing cork under a microscope?Louis PasteurRobert HookeAntonie van LeeuwenhoekTheodor Schwann

What scientist was the first to propose a mechanism for how species could change through repeated use or disuse of a body part?Multiple choice question.BuffonLamarckDarwinHutton

In order for a peripheral nerve fiber to regenerate it must have

According to the videotape “Secrets of the Mind”, what creative device did Dr. Ramachandran develop to help an amputee patient who was experiencing pain in his missing hand?Group of answer choicesA. A Prosthetic HandB. The Mirror BoxC. The Hand MassagerD. The Acupuncture Glove