TO STUDY IN THE DOG THE LOCALIZATION OF THE MOTOR AREAS IN THE HYPOTHALAMUS AND THEIR CONNECTION VIA THE MEDULLA AND SPINAL CORD FOR THE PRODUCTION OF EXCITATORY AND INHIBITORY EFFECTS ON THE STOMACH AND BLOOD PRESSURE
Abstract
The presor and depressor effects and its localizations were investigated physiologically and histologically on the dog's cerebral peduncle and its rostral part until the hypothalamus. The remarkable pressor and depressor effects which produced the changes on the systemic blood pressure more than 30 mm Hg were observed on 116 dogs. The changes of heart rate and respiration, which were followed to the pressor and depressor effects, were examined. 77 pressor areas and 69 depressor areas were determined on the histological examination. 64.9% of 77 pressor areas was located in the peduncle region. In the rostal part of it, the pressor areas were found in 12.9% (between peduncle and n.oculomotori), 15.6% (region of n.oculomotori), 0%(mamillary region), and 3.9% (hypothalamus region). 40.6% of 69 depressor areas was located in the peduncle and 11.6% was in the region between the peduncle and n.oculomotori. 20.3% was in the region of n.oculomotori. 13.0% was in mamillary region, 14.5% was in the region of hypothalamus. Both pressor and depressor areas in the region of peduncle, were located in Nucleus reticularis pontis oralis (Formatio reticularis) and Nucleus cuneiformis. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 14, 1962
- Accession Number
- AD0292262
Entities
People
- Takehiko Semba
Organizations
- Hiroshima University