The reticular formation is made up of a dense and complex network of neurons, afferent, and efferent fibers. The reticular formation consists of more than 100 small neural networks, with varied functions including: Somatic motor control: Some motor neurons send their axons to the reticular formation nuclei, giving rise to the reticulospinal tracts of the spinal cord. The reticular neurons receive sensory AND motor inputs. The Reticular formation is a rod-shaped brainstem structure associated with the upper motor system and involved with movement.. The reticular formation is a poorly-differentiated area of the brain stem, centered roughly in the pons. The thymus has epithelial reticular cells. This function is mediated by the reticular activating system (RAS), also known as the ascending arousal system. Its functions can be classified into 4 categories: motor control, sensory control, visceral control, and control of consciousness. The alpha 2-adrenergic receptor antagonists (e.g., mirtazapine and mianserin) appear to enhance the release of both serotonin and norepinephrine by blocking auto- and hetero-alpha 2 receptors. The reticular formation, phylogenetically one of the oldest portions of the brain, is a poorly-differentiated area of the brain stem, centered roughly in the pons, but with the ascending reticular activating system connecting to areas in the thalamus, hypothalamus, and cortex, and the descending reticular activating system connecting to the cerebellum and sensory nerves. The term reticular formation derives from the characteristic appearance of loosely packed cells of varying sizes and shapes, embedded in a dense meshwork of cell processes, including dendrites and axons. View the full answer. The neurons of the reticular formation make up a complex set of networks in the core of the brainstem that extend from the upper part of the midbrain to the lower part of the medulla oblon The term reticular formation refers only to the polysynaptic network in the brainstem, although the network continues rostrally into the thalamus and hypothalamus, and caudally into the propriospinal network of the spinal cord. James Keene. These circuits shift attention levels and lead to desynchronized EEG and gamma activity (Steriade, 1995). It is the primary location of dermal elastic fibers. It serves as the intermediary in an indirect projection between cortical areas associated with movement (primary motor cortex and premotor cortex) and medial regions of the spinal cord.Axon tracts running from the associated motor regions Reason: The reticular formation is a web of gray matter between the white fiber tracts and brainstem nuclei. n. A diffuse network of white longitudinal nerve fibers interspersed with gray matter, located in the brainstem, that regulates various autonomic functions, such as sleep and waking. Updated: 10/03/2021 Table of Contents Center of medulla, pons and midbrain. The reticular activating system (RAS) is a component of the reticular formation in vertebrate brains located throughout the brainstem. The reticular formation is located in the portion of the brainstem known as the pons. It has a diverse input; its descending connexions are mostly from the cerebral cortex, cerebellum and red nuclei. central region of the brainstem. SDARC LOCATION + BUSINESS HOURS. Phylogenetically :- old system. Is it in the hindbrain or midbrain? The reticular formation (RF) is a collection of nerve nuclei and fibers. The reticular formation is a region in the pons involved in regulating the sleep-wake cycle and filtering incoming stimuli to discriminate irrelevant background stimuli.It is essential for governing some of the basic functions of higher organisms, and is one of the phylogenetically oldest portions of the brain. The reticular formation is a set of interconnected nuclei that are located throughout the brainstem. It is not anatomically well defined because it includes neurons located in diverse parts of the brain.
The reticular formation is a set of interconnected nuclei that are located throughout the brainstem.It is not anatomically well defined, because it includes neurons located in different parts of the brain.The neurons of the reticular formation make up a complex set of networks in the core of the brainstem that extend from the upper part of the midbrain to the lower part of the medulla oblongata.