The organization of the nucleus reticularis thalami: A golgi study

摘要: Summary o 1. The organization of the n. reticularis thalami has been studied in 500 mouse, rat, and cat brains constituting at least 10,000 histological sections. All material was stained by modifications rapid Golgi method, controlled with Golgi-Cox, Nissl, Kluver Bielschowsky preparations. 2. dominant orientation dendritic mass cells is perpendicular to course thalamo-cortical cortico-thalamic radiations which traverse field. 3. dendrites are characterized long filamentous spines, often 10 μ length or more. They thought increase available area dendrite membrane, lying along thrust into small fascicles passage fibers. 4. neuropil plexus field consists collaterals from thalamocortical fibers passage, first portion cell axons. This presynaptic spreads throughout entire nucleus forms matrix within embedded. 5. great majority neurons send their large axons caudad thalamus where they synapse widely specific non-specific systems. Many break up 2, 3, more major caudal-running branches so 6. A very restricted number we have examined (4%) caliber rostrally, but it believed that these terminate corpus striatum. 7. We conclude cannot be conceived as a final common pathway thalamic projection upon cortex. It appears, rather, represent centrifugal system projects integrate most interactions back nuclei. would thus appear function critical link re-entrant circuits many lengths. Serving capstone hierarchy polysynaptic loops varying complexity, might well modulate all ongoing activity exerting control over between