PubMed Health⌕ Search

Biomedical subjects

J H Magilton

Publications and source records attributed to J H Magilton.

11 recordsLinked to original sources
PubMed1981

Experimental evidence of reciprocal temperature relationship between the parietofrontal region and the orbital emissary vein in the pony.

The heads of 5 ponies were embalmed and the vessels were double injected with latex. Dissection of these specimens revealed venous pathways (1) from the nasal area to the cavernous sinus and (2) from the parietofrontal region to the ventral petrosal sinus. Thermistors were chronically implanted near the orbital emissary veins of 3 additional ponies. Hot and cold packs were applied alternately to the parietofrontal regions. The temperature near the orbital emissary veins increased during the 5 trials with cold application and decreased during the 5 trials with hot application. The authors were able to influence physiologic adjustments in the heat loss in the nasal area (evidenced by temperature changes near the orbital emissary veins) by imposing nonphysiologic changes in the temperature of the venous blood draining the parietofrontal region.

Animals↗
PubMedDate not supplied

Angularis oculi vein temperature variations related to man's mental activity--preliminary studies.

This preliminary study describes a noninvasive, inexpensive approach to the study of lateralization as related to mental activity. It supports the concept of a thermoregulatory role of blood in cerebral temperature control. Right and left angularis oculi vein temperatures were measured during periods of mental activity and mental rest and both temperature changes were asymmetrical. There was a consistent temperature drop during thinking, with a consistent rise after thinking ceased. Heat loss from superficial vessels of the buccal region and nasal mucosa to the ambient air was evident which caused lowering of the venous blood temperature flowing towards the cavernous sinus. This drop in blood temperature of angularis oculi veins coincided with increased brain metabolism and heat production occasioned by an increase in the level of mental activity and oxygen utilization.

Body Temperature Regulation↗