Biomedical subjects
Publications and source records attributed to T Satoda.
The parabrachial nucleus neurons were demonstrated to have long dendrites extending into the brachium conjunctivum after horseradish peroxidase was injected into the amygdala. This morphologic characteristic was confirmed using the Golgi impregnation technique.
Spinal neurons projecting to the facial nucleus, located in the lateral portion of lamina V from the C1 to C4 segments, had long dendrites extending into lamina IV. The detailed morphology of these spinal neurons was confirmed using the Golgi impregnation method. Dorsal root fibers were distributed mainly to lamina IV at the C1 and C2 segments. These findings indicated the possibility of direct connections between the primary afferent fibers and spinal neurons projecting to the facial nucleus in lamina IV of the upper cervical cords. In order to confirm the connections, electron microscopic observation was carried out on the dorsal horn after injections of horseradish peroxidase into the facial nucleus and dorsal root fibers.
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Distribution of cerebellar neurons which send their axons to the spinal cord was examined in 7 Japanese monkeys (Macaca fuscata) and 10 cats by the horseradish peroxidase (HRP) method; retrograde HRP-labeling of cerebellar neurons was observed after HRP injection into the spinal cord. The vast majority of cerebellospinal neurons were located in the fastigial nucleus (FN), posterior interpositus nucleus (PIN), and intermediate medullary region (IMR) between the FN and PIN. These neurons were suggested to send fibers to the cervical and upper thoracic cord segments in the monkey, or to the cervical cord segments in the cat. A few cerebellospinal neurons were also found in the anterior interpositus nucleus (AIN) and the dentate nucleus (DN).
Injection of horseradish peroxidase into the cervical cord in the macaque monkey led to the retrograde labeling of neurons in the caudal part of the central nucleus of the amygdala ipsilateral to the spinal half where the injection was made. Although the number of labeled neurons in the amygdala was small, they were constantly found in 7 macaque monkeys (3 Japanese monkeys, 3 crab-eating monkeys and 1 rhesus monkey) which were injected with the enzyme into the upper and middle cervical cord segments.