Ventromedial Medulla
Ventromedial Medulla - Related Videos
04:27
Analyzing Dendritic Morphology Across Drosophila Medulla Layers and Columns
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2025
Source: Ting, C., et al., Analyzing Dendritic Morphology in Columns and Layers. J. Vis. Exp. (2017)This video demonstrates the procedure of preparing a Drosophila brain, capturing horizontal and frontal image stacks of GFP-labeled medulla dendrites under a confocal microscope, and creating a 3D reconstruction to analyze their morphology across layers and columns.
01:21
Brainstem: Control Centers of Medulla
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2025
The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei. Olivary Nucleus The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
01:27
Sympathetic Pathways: Collateral Ganglia and Adrenal Medulla
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2025
The sympathetic pathways of the collateral ganglia and adrenal medulla serve unique but interconnected roles in the sympathetic response. Collateral Ganglia Sympathetic preganglionic axons reach the collateral ganglia along the route of splanchnic nerves. These nerves bypass the sympathetic trunk and communicate with sympathetic postganglionic neurons housed in the prevertebral ganglia. These ganglia supply the organs of the abdominopelvic cavity. The greater splanchnic nerve, formed by the...
11:10
Membrane Potential Dye Imaging of Ventromedial Hypothalamus Neurons From Adult Mice to Study Glucose Sensing
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Cited by 8 •
2013
The activity of single neurons from adult-aged mice can be studied by dissociating neurons from specific brain regions and using fluorescent membrane potential dye imaging. By testing responses to changes in glucose, this technique can be used to study the glucose sensitivity of adult ventromedial hypothalamic neurons.
10:31
Comparative Proteomic Analysis of Whole Kidney, Medulla, and Cortical Tubules in Diabetic Pathogenesis of Kidney Injury in Mice
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2025
Here, we present a detailed protocol for proteomic analysis of the whole kidney, isolated cortical tubule, and medullary proteomes. The study also compares regional proteomes in a diabetic mouse model and non-diabetic mice.
FAQs
Signals from the periaqueductal gray provide higher-level control over ventromedial medulla activity. This connection allows information related to pain, stress, and defensive states to shape descending commands directed toward the spinal dorsal horn. As a result, the system can adjust nociceptive signaling according to the organism’s broader behavioral and physiological circumstances rather than processing painful input in isolation.
Descending control is not uniformly suppressive. Within the ventromedial medulla, serotonergic and other neurotransmitter systems can either inhibit or facilitate nociceptive signaling in the spinal dorsal horn. This bidirectional influence helps explain why the same brainstem circuitry may reduce pain sensitivity in one state but increase responsiveness in another, depending on how the relevant pathways are engaged.
Serotonergic signaling is one component of the ventromedial medulla’s descending influence on spinal nociceptive processing. In the dorsal horn, these signals can contribute to either inhibition or facilitation of pain-related transmission. Examining serotonin within this circuit therefore helps researchers connect brainstem activity with changes in pain sensitivity, while recognizing that other neurotransmitter systems also contribute.
Pain regulation occurs alongside changes in bodily state and defensive behavior. Because the ventromedial medulla integrates sensory, autonomic, and defensive responses, its activity can be studied as part of a coordinated response rather than as an isolated pain pathway. This broader perspective is important for understanding how stress-related and autonomic conditions may influence nociceptive processing.
Studies of this circuitry generally focus on how signals move between higher centers, the ventromedial medulla, and the spinal dorsal horn. Researchers can relate these connections to changes in pain sensitivity, stress responses, and autonomic function. Mapping the pathway and assessing its inhibitory or facilitatory influence provides a framework for interpreting how the nervous system adjusts bodily responses.
Persistent changes in descending pain control may help explain mechanisms associated with chronic pain. The ventromedial medulla is therefore examined as a possible point where pain sensitivity can be regulated through interactions among higher brain centers, brainstem circuits, and the spinal dorsal horn. Understanding these interactions may identify targets for analgesic therapies aimed at modifying abnormal nociceptive control.