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Rod bipolar cells do not synapse directly on to ganglion cells. Instead, rod bipolar cells synapse on to a Retina amacrine cell, which in turn excite cone ON bipolar cells (via gap junctions) and inhibit cone OFF bipolar cells (via glycine-mediated inhibitory synapses) thereby overtaking the cone pathway in order to send signals to ganglion ...
Lithium is approved by the FDA for the treatment of bipolar disorder and is widely prescribed off-label as a treatment for major depressive disorder, [12] often as an augmentation agent. Lithium is recommended for the treatment of schizophrenic disorders only after other antipsychotics have failed; it has limited effectiveness when used alone.
Bipolar cells convey impulses from photoreceptors (rods and cones) to ganglion cells, [6] which in turn transport the visual signals to the brain through the optic nerve. Bipolar cells come in two varieties, having either an on-center or an off-center receptive field, each with a surround of the opposite sign. The off-center bipolar cells have ...
A variety of other agents have been tried in bipolar disorder, including benzodiazepines, calcium channel blockers, L-methylfolate, and thyroid hormone. [2] Modafinil (Provigil) and pramipexole (Mirapex) have been suggested for treating cognitive dysfunction associated with bipolar depression, but evidence supporting their use is quite limited.
Lithium Lithium is the "classic" mood stabilizer, the first to be approved by the US FDA, and still popular in treatment. Therapeutic drug monitoring is required to ensure lithium levels remain in the therapeutic range: 0.6 to 0.8 or 0.8–1.2 mEq/L (or millimolar).
Risk factors for bipolar include obstetric complications, abuse, drug use, and major life stressors. [ 28 ] The " kindling model " of mood disorders suggests that major environmental stressors trigger initial mood episodes, but as mood episodes occur, weaker and weaker triggers can precipitate an affective episode.
Biological psychiatry or biopsychiatry is an approach to psychiatry that aims to understand mental disorder in terms of the biological function of the nervous system.It is interdisciplinary in its approach and draws on sciences such as neuroscience, psychopharmacology, biochemistry, genetics, epigenetics and physiology to investigate the biological bases of behavior and psychopathology.
Examples of bipolar neurons include most invertebrate sensory neurons and bipolar cells of the vertebrate retina. Some vertebrate sensory neurons are classified as pseudounipolar. Pseudounipolar neurons initially develop as bipolar cells, but at some point the two processes that extend from the cell body fuse to form a single neurite. [4]
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