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What does the RAS do in the brain?
The reticular activating system (RAS), or extrathalamic control modulatory system, is a set of connected nuclei in thebrains of vertebrates that is responsible for regulating arousal and sleep-wake transitions. As its name implies, its most influential component is the reticular formation.
What are extra-pyramidal centers?
premotor area of cerebral cortex (area 6)corpus striatum (caudate & lentiform nuclei)subthalamic nucleus (in subthalamus)red nucleus (in midbrain)substantia nigra (in midbrain)inferior olivary nucleus (in medulla)nuclei of reticular formation (in brainstem)
What are the five nuclear groups of thalamus?
medial groupanterior grouplateral group, subdivided into = dorsal lateral + postero-lateral nucleiventral group, subdivided into = anterior ventral + imtermediate ventral + posterior ventral nucleinon-specific nuclei, which include = intralaminar + reticular + middle line nuclei
What are the origins for lateral spinothalamic and anterior spinothalamic tracts?
Lateral reticulospinal tract : It arises from the nuclei of reticular formation of the brain stem (mainly medulla)Medial reticulspinal tract : It arises from the nuclei of reticular formation of the brain stem (mainly pons)
What connective tissue surrounds the spleen?
The tissue of the spleen is reticular connective tissue.
Many cells among network of reticular fibers?
reticular tissue
What is the framework for many soft organs?
reticular fibers
What connective tissue types forms the framework of the spleen lymph nodes and bone marrow?
Reticular connective tissue
What forms supporting tissue in walls of thymus and spleen?
Reticular Connective
Name the 3 types of fibers in areolar connective tissue?
the three basic types of fibers that are found in connective tissue are collagen fibers, elastic fibers, and reticular fibers
What is the medial nuclei of the thalamus?
It depends on which group of thalamic nuclei that you are referring to.anterior group of nuclei = relay station for hippocampal impulsesmedial group of nuclei = relay station for visceral impulsesanterior ventral group of nuclei = relay station for extrapyramidal impulsesintermediate ventral group of nuclei = relay station for cerebellar impulses concerned with integration of muscle tonepostero-lateral ventral group of nuclei = relay station for exteroceptive impulses & proprioceptive impulses from the opposite side of the body below the headpostero-medial ventral group of nuclei = relay station for exteroceptive and proprioceptive impulses from opposite side of headinterlaminar + midline + reticular nuclei = participate in the arousal reactions of the brain
The dense fibrous connective tissue portion of the skin is located in the reticular region of the dermis?
reticular
