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Biomedical subjects

M Magri

Publications and source records attributed to M Magri.

23 records · Page 2Linked to original sources
PubMedDate not supplied

Vegetative imbalance in migraine. A dynamic TV pupillometric evaluation.

In this study we investigated the variations of pupillary diameter obtained in different experimental conditions (dark/light adaptation, light reflex, sural nerve stimulation) in a group of migraine patients with unilateral location of pain in almost all the attacks and in healthy controls by means of a TV pupillometric device. The data obtained seems to document the existence in migraine of unbalanced vegetative function ascribable either to a strong sympathetic activity or to a parasympathetic deficiency. Moreover, an involvement of central integrative pathways regulating pupil functioning cannot be excluded.

Adult↗
PubMedDate not supplied

Electronic pupillometry for investigating pupil reactivity to different exteroceptive stimuli: applications and limits.

Iris neuromuscular junction represents a site of reciprocal interactions of sympathetic and parasympathetic innervation and can be considered a useful tool to investigate both systems in physiological and pathological conditions. In this study 35 healthy subjects of different ages were examined by an infrared TV pupillometer to assess darkness and light adaptation, as well as pupillary response to light and to exteroceptive stimulation (RIII reflex). A progressive impairment of pupil adaptability to light stimuli with aging was also observed, while a significant correlation was found between the intensity of electrical stimulation of the sural nerve and the percent increase in pupil diameter. The evaluation of pupil responsiveness is considered for its possible applications in various neurological disorders.

Adaptation, Physiological↗