Regional blood flow changes in response to thermal stimulation of the brain and spinal cord in the Pekin duck

1982 ◽  
Vol 147 (1) ◽  
pp. 71-77 ◽  
Author(s):  
C. Bech ◽  
W. Rautenberg ◽  
B. May ◽  
K. Johansen
Keyword(s):  
Spinal Cord ◽  
Blood Flow ◽  
Regional Blood Flow ◽  
Thermal Stimulation ◽  
Pekin Duck ◽  
Flow Changes ◽  
Brain And Spinal Cord ◽  
The Brain ◽  
Stimulation Of

Regional blood flow in the brain and spinal cord of hypothermic rats

1989 ◽  
Vol 257 (3) ◽  
pp. H785-H790
Author(s):  
T. Sakamoto ◽  
W. W. Monafo
Keyword(s):  
Spinal Cord ◽  
Blood Flow ◽  
Brain Stem ◽  
Regional Blood Flow ◽  
Experimental Conditions ◽  
Pentobarbital Sodium ◽  
Arterial Blood ◽  
Group A ◽  
Group B ◽  
The Brain

[14C]butanol tissue uptake was used to measure simultaneously regional blood flow in three regions of the brain (cerebral and cerebellar hemispheres and brain stem) and in five levels of the spinal cord in 10 normothermic rats (group A) and in 10 rats in which rectal temperature had been lowered to 27.7 +/- 0.3 degrees C by applying ice to the torso (group B). Pentobarbital sodium anesthesia was used. Mean arterial blood pressure varied minimally between groups as did arterial pH, PO2, and PCO2. In group A, regional spinal cord blood flow (rSCBF) varied from 49.7 +/- 1.6 to 62.6 +/- 2.1 ml.min-1.100 g-1; in brain, regional blood flow (rBBF) averaged 74.4 +/- 2.3 ml.min-1.100 g-1 in the whole brain and was highest in the brain stem. rSCBF in group B was elevated in all levels of the cord by 21-34% (P less than 0.05). rBBF, however, was lowered by 21% in the cerebral hemispheres (P less than 0.001) and by 14% in the brain as a whole (P less than 0.05). The changes in calculated vascular resistance tended to be inversely related to blood flow in all tissues. We conclude that rBBF is depressed in acutely hypothermic pentobarbital sodium-anesthetized rats, as has been noted before, but that rSCBF rises under these experimental conditions. The elevation of rSCBF in hypothermic rats confirms our previous observations.

Experimental Nondestructive Electrical Stimulation of the Brain and Spinal Cord

1970 ◽  
Vol 32 (5) ◽  
pp. 553-559 ◽  
Author(s):  
J. Thomas Mortimer ◽  
C. Norman Shealy ◽  
Connie Wheeler
Keyword(s):  
Spinal Cord ◽  
Electrical Stimulation ◽  
Brain And Spinal Cord ◽  
The Brain ◽  
Stimulation Of

scholarly journals Localisation of function in the lemur’s brain

1908 ◽  
Vol 80 (537) ◽  
pp. 136-147 ◽  
Keyword(s):  
Spinal Cord ◽  
Cerebral Cortex ◽  
Experimental Methods ◽  
Histological Structure ◽  
Full Account ◽  
Cortex Cerebri ◽  
The Subject ◽  
Brain And Spinal Cord ◽  
The Brain ◽  
Stimulation Of

The brain of the Lemur, the lowest of the ape-like animals, does not appear to have been subjected previously to a thorough examination. Page May and Elliott Smith brought a brief communication on the subject before the Cambridge Meeting of the British Association in 1904. Their experiments were apparently limited to stimulation of the cerebral cortex, and they have never published a full account of their work. Brodmann has worked out some of the histological details of the structure of the cortex cerebri, and Max Volsch has performed a stimulation experiment upon one Lemur. The work of these investigators will be referred to again in the course of this paper. Our own investigation has in the main dealt with the motor centres, and the experimental methods adopted have been the usual ones of stimulation and extirpation. In animals so low in the scale, stimulation is to be regarded as the more decisive of the two methods for the purpose of localisation. The extirpation experiments have, however, confirmed the results of stimulation, and in these experiments the course of the resulting degeneration was followed by histological examination of the brain and spinal cord. The results, moreover, agree remarkably closely with those obtained by a study of the histological structure of the various regions of the cortex cerebri.

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