Abstract
Little is known about the structures and mechanisms involved in the autonomic response to sensory and nociceptive stimulation. In this study, we recorded simultaneously pupil diameter, blood pressure, heart rate and pain levels during a cold-pressor test in 10 healthy subjects. The aim was to evaluate the different components of the Autonomic Nervous System involved in the response to a thermal-painful stimulus. A biphasic pupillary response was observed: an initial, short-lasting mydriasis, followed by a miotic phase, this latter characterized by rhythmic fluctuations of pupil diameter. The blood pressure response was monophasic with a moderate increase observed from the second minute of the test. Pain intensities remained stable on medium-high levels throughout the test. The topical application of thymoxamine and homatropine clarified some aspects of the pupillary response. The systemic administration of naloxone suggested a role of opiates in the modulation of pupillary and cardiovascular response to the cold-pressor test.
| Original language | English |
|---|---|
| Pages (from-to) | 45-49 |
| Number of pages | 5 |
| Journal | Journal of the Autonomic Nervous System |
| Volume | 55 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Oct 5 1995 |
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Keywords
- Cardiovascular response
- Opiate
- Pain
- Pupil
ASJC Scopus subject areas
- Physiology
- Clinical Neurology
- Neuroscience(all)
Cite this
Pupillary and cardiovascular responses to the cold-pressor test. / Tassorelli, Cristina; Micieli, Giuseppe; Osipova, Vera; Rossi, Francesco; Nappi, Giuseppe.
In: Journal of the Autonomic Nervous System, Vol. 55, No. 1-2, 05.10.1995, p. 45-49.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Pupillary and cardiovascular responses to the cold-pressor test
AU - Tassorelli, Cristina
AU - Micieli, Giuseppe
AU - Osipova, Vera
AU - Rossi, Francesco
AU - Nappi, Giuseppe
PY - 1995/10/5
Y1 - 1995/10/5
N2 - Little is known about the structures and mechanisms involved in the autonomic response to sensory and nociceptive stimulation. In this study, we recorded simultaneously pupil diameter, blood pressure, heart rate and pain levels during a cold-pressor test in 10 healthy subjects. The aim was to evaluate the different components of the Autonomic Nervous System involved in the response to a thermal-painful stimulus. A biphasic pupillary response was observed: an initial, short-lasting mydriasis, followed by a miotic phase, this latter characterized by rhythmic fluctuations of pupil diameter. The blood pressure response was monophasic with a moderate increase observed from the second minute of the test. Pain intensities remained stable on medium-high levels throughout the test. The topical application of thymoxamine and homatropine clarified some aspects of the pupillary response. The systemic administration of naloxone suggested a role of opiates in the modulation of pupillary and cardiovascular response to the cold-pressor test.
AB - Little is known about the structures and mechanisms involved in the autonomic response to sensory and nociceptive stimulation. In this study, we recorded simultaneously pupil diameter, blood pressure, heart rate and pain levels during a cold-pressor test in 10 healthy subjects. The aim was to evaluate the different components of the Autonomic Nervous System involved in the response to a thermal-painful stimulus. A biphasic pupillary response was observed: an initial, short-lasting mydriasis, followed by a miotic phase, this latter characterized by rhythmic fluctuations of pupil diameter. The blood pressure response was monophasic with a moderate increase observed from the second minute of the test. Pain intensities remained stable on medium-high levels throughout the test. The topical application of thymoxamine and homatropine clarified some aspects of the pupillary response. The systemic administration of naloxone suggested a role of opiates in the modulation of pupillary and cardiovascular response to the cold-pressor test.
KW - Cardiovascular response
KW - Opiate
KW - Pain
KW - Pupil
UR - http://www.scopus.com/inward/record.url?scp=0028849337&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028849337&partnerID=8YFLogxK
U2 - 10.1016/0165-1838(95)00026-T
DO - 10.1016/0165-1838(95)00026-T
M3 - Article
VL - 55
SP - 45
EP - 49
JO - Journal of the Autonomic Nervous System
JF - Journal of the Autonomic Nervous System
SN - 0165-1838
IS - 1-2
ER -