What is the magnocellular pathway?
The magnocellular pathway is one of the three primary subcortical pathways (magnocellular, parvocellular, and koniocellular pathways) leading from the retina to visual cortex via the lateral geniculate nucleus (LGN).
What do magnocellular cells do?
Magnocellular cells make up the magnocellular layers of the lateral geniculate nucleus. They are relatively large cells that display specialization in detecting aspects of movement, such as the location, speed, and direction of a moving object.
What are the M and pathways in the brain?
The magnocellular and parvocellular pathways (M and P pathways) are the major pathways of the visual system, accounting for most of the axons that leave the retina and the perceived vision, as demonstrated by loss of vision when the pathways are destroyed.
What is a magnocellular neuron?
Magnocellular neurons (MCN) are neuroendocrine cells located in the hypothalamus; they are among the largest cells in the brain, and synthesise the hormones arginine vasopressin (AVP) and oxytocin (OT). These neuropeptides are secreted from MCN terminals in the neurohypophysis (NH).
What is the difference between the magnocellular and parvocellular pathways?
The Magnocellular pathway carries information about large, fast things (low spatial frequency; high temporal frequency) and is colorblind. The Parvocellular pathway carries information about small, slow, colorful things (high spatial frequency information; low temporal frequency information).
What are parasol ganglion cells?
Parasol cells are another major type of ganglion cell in primates, comprising approximately 5% of all ganglion cells in the central retina and 15% in the peripheral retina. Parasol cells are also known as M cells because they project to the magnocellular layers of the LGN.
Where are magnocellular neurons?
What is the magnocellular neurosecretory system?
Magnocellular neurosecretory cells are large neuroendocrine cells within the supraoptic nucleus and paraventricular nucleus of the hypothalamus. These cells are neuroendocrine neurons, are electrically excitable, and generate action potentials in response to afferent stimulation.
What is magnocellular and parvocellular pathways?