Till sidans topp

Sidansvarig: Webbredaktion
Sidan uppdaterades: 2012-09-11 15:12

Tipsa en vän
Utskriftsversion

Reflex cardiovascular res… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

Reflex cardiovascular responses to graded stimulations of low- and high-threshold afferents in the carotid sinus and aortic nerves in the cat.

Artikel i vetenskaplig tidskrift
Författare Bengt Öberg
Ed Kendrick
Peter Thorén
Göran Wennergren
Publicerad i Acta physiologica Scandinavica
Volym 113
Nummer/häfte 2
Sidor 129-37
ISSN 0001-6772
Publiceringsår 1981
Publicerad vid Fysiologiska institutionen
Sidor 129-37
Språk en
Länkar dx.doi.org/10.1111/j.1748-1716.1981...
www.ncbi.nlm.nih.gov/entrez/query.f...
Ämnesord Animals, Aorta, innervation, Atropine, pharmacology, Blood Pressure, Carotid Body, physiology, Cats, Electric Stimulation, Heart, physiology, Heart Rate, Neurons, Afferent, drug effects, physiology, Pressoreceptors, physiology, Reflex, physiology
Ämneskategorier Fysiologi

Sammanfattning

Reflex responses to electrical stimulation of low-threshold and high-threshold afferents in the aortic and carotid sinus nerves were investigated in chloralose-anesthetized cats. Changes in blood pressure, heart rate and muscle resistance were recorded. Low-threshold stimulation induced depressor responses of moderate magnitude. When stimulation intensity was increased to engage also the high threshold aortic nerve afferents a more pronounced reflex response was seen even with stimulation frequencies less than 10 Hz. Furthermore, stimulation of low- and high-threshold aortic nerve afferents induced different reflex patterns. For a given fall in blood pressure, the low-threshold afferents induced a greater reflex decrease in muscle vascular resistance compared with the high-threshold afferents, which reduced heart rate more. The effects seen at low frequency stimulation of high-threshold aortic nerve afferents were interpreted to reflect activation of the non-medullated baroreceptor afferents, while the depressor reflexes at low-threshold stimulation were induced by medullated baroreceptor afferents. Also the reflex effects of continuous and intermittent stimulation patterns of the various afferents were compared. At the same number of imp/s an intermittent stimulation of the low-threshold afferents induced greater reflex changes in blood pressure and muscle vascular resistance but smaller changes in heart rate. No such difference was observed when high-threshold afferents were similarly stimulated.

Sidansvarig: Webbredaktion|Sidan uppdaterades: 2012-09-11
Dela:

På Göteborgs universitet använder vi kakor (cookies) för att webbplatsen ska fungera på ett bra sätt för dig. Genom att surfa vidare godkänner du att vi använder kakor.  Vad är kakor?