Soldiers and professional athletes often suffer traumatic brain injuries (TBIs) due to severe impacts. Rapid detection of TBIs can be challenging, since tr
about 6 years ago
Visual Processing: Cortical Pathways (Section 2, Chapter 15) Neuroscience Online: An Electronic Textbook for the Neurosciences | Department of Neurobiology and Anatomy - The University of Texas Medical School at Houston
The visual system is unique as much of visual processing occurs outside the brain within the retina of the eye. The previous chapter described how the light-sensitive receptors of the eye convert the image projected onto the retina into spatially distributed neural activity in the first neurons of the visual pathway (i.e., the photoreceptors). Within the retina, the receptors synapse with bipolar and horizontal cells, which establish the basis for brightness and color contrasts. In turn, the bipolar cells (the 2° visual afferent) synapse with retinal ganglion cells and amacrine cells, which enhance contrast effects that support form vision and establish the basis for movement detection. The information from the eye is carried by the axons of the retinal ganglion cells (the 3° visual afferent) to the midbrain and diencephalon. This chapter will provide more information about visual pathway organization and the visual processing that occurs within the brain.
about 6 years ago
The Complex regional pain syndrome (CRPS) is an unceasing pain condition that often affects one of the limbs (that can be arms, legs, hands, or feet), generally after an injury or trauma to that particular limb. Complex regional pain syndrome is believed to be caused due to damage, or malfunctioning of the peripheral and central nervous systems. The central nervous system encompasses the brain and spinal cord; whereas the peripheral nervous system includes the nerve signaling from the brain and the spinal cord to the other parts of the body. The Complex Regional Pain Syndrome is exemplified by prolonged or a chronic pain and mild or dramatic changes in the color of the skin, temperature or even swelling in the affecting area.
almost 6 years ago