Clinical manifestations and specifics
The key signs of asthenia are rapid exhaustion and hyperesthesia. In the structure of organic brain diseases, this syndrome is accompanied by focal neurological symptoms and pronounced somatovegetative disturbances, such as headaches, weather sensitivity, and dysregulation of somatic functions.
In mild organic lesions, asthenia is complemented by the sharpening of premorbid personality traits. Meanwhile, endogenous diseases such as schizophrenia or manic-depressive psychosis are rarely accompanied by clear signs of asthenia: passivity in schizophrenia is caused by abulia, and depression is considered a sthenic emotion.
The place of asthenia in the tier concept
In psychiatry, mild neurotic disorders have the lowest specificity, as they can occur in almost any disease. According to the tier concept, where the level reflects the threshold of severity:
- Asthenic syndrome is located at the very lowest tier.
- Lower-tier disorders occur universally and have lower specificity.
- As the disease worsens, higher-tier manifestations join the mild symptoms, narrowing the diagnostic scope.
Diagnostic features
Diagnosis of conditions with asthenic syndrome relies on a clinical rule: the absence of paraclinical abnormalities does not rule out the diagnosis of an organic disease. A comprehensive approach is used for verification:
- Neurological and ophthalmological examination.
- Neuroimaging (CT, MRI) and EEG.
- Vascular studies (REG, USDG).
- Laboratory cerebrospinal fluid analyses and serological tests.
Class and exam questions
What conditions are characterized by asthenic syndrome?
It is observed in neurasthenia, as well as in infectious, traumatic, intoxication, and vascular brain lesions (organic diseases).
Why is asthenia considered a lower-tier disorder?
Because it has the lowest specificity, frequently acts as the onset of the disease, and occurs in a wide variety of pathologies, unlike seizures or psychotic symptoms of higher tiers.
Does a normal instrumental test result rule out an organic disease?
No. An important clinical rule states that the absence of clear signs of pathology on paraclinical examination does not exclude an organic diagnosis.
What else to study on this topic
- Classification of psychopathological syndromes by A.V. Snezhnevsky
- Single psychosis theory and views of K. Bonhoeffer
- Focal neurological symptoms in organics
- Personality changes according to E. Bleuler in brain lesions
- Differential diagnosis of organic psychoses and neuroses
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