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Vascular Spasm

Vascular Spasm

The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last for...

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Motor cortex excitability in vascular depression.

Rita Bella¹, Raffaele Ferri, Mariagiovanna Cantone

¹Department GF Ingrassia, Section of Neurosciences, University of Catania, Via Santa Sofia, 78-95123 Catania, Italy.

International Journal of Psychophysiology : Official Journal of the International Organization of Psychophysiology

|September 28, 2011

Summary

This summary is machine-generated.

This study found no significant differences in motor cortical excitability between vascular depression patients, subcortical vascular disease patients, and controls. Findings support the vascular depression hypothesis, linking symptoms to cerebral small vessel disease.

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Area of Science:

Neuroscience
Neurology
Psychiatry

Background:

Vascular depression (VD) is a subtype of depression characterized by late onset and comorbid cerebrovascular disease.
Previous research in Major Depression suggests hemispheric differences in motor cortical excitability, but this is less understood in VD.

Purpose of the Study:

To investigate excitatory/inhibitory intracortical circuit changes in patients with vascular depression.
To examine interhemispheric differences in motor cortical excitability within the vascular depression group.

Main Methods:

Bilateral motor threshold and paired-pulse studies were conducted on 15 vascular depressed elderly (VD) patients, 10 non-depressed subcortical vascular disease (SVD) patients, and 10 age-matched controls.
Magnetic resonance imaging (MRI) assessed brain vascular burden, and neuropsychological tests evaluated cognitive function.

Main Results:

Vascular depression patients exhibited significantly higher executive dysfunction and apathy compared to controls.
No significant differences were observed in resting motor threshold, cortical silent period, or paired-pulse measures between VD, SVD, and control groups.
No significant interhemispheric differences in motor cortical excitability were found within the VD group.

Conclusions:

Neurophysiological mechanisms in VD appear distinct from Major Depression and similar to those in SVD.
Findings support the vascular depression hypothesis, positing that depressive symptoms are a manifestation of underlying cerebral small vessel disease rather than a primary psychiatric disorder.