Vascular brain pathologies
Memory decline and the development of mnemonic disorders frequently occur against the background of cerebral atherosclerosis and hypertension. Treatment is effective only in the early stages, when it is possible to slow down the progression of the process and improve cerebral blood supply.
Main drug groups:
- Vasodilators: vinpocetine, cinnarizine, Ginkgo biloba leaf extract.
- Anticoagulants and antiplatelet agents: acetylsalicylic acid, pentoxifylline.
- Nootropics: standard medications (piracetam, memantine) should be prescribed with caution due to the risk of anxiety and insomnia. Agents without a pronounced stimulating effect (choline alphoscerate, phenibut) are better tolerated.
- Metabolic agents and antioxidants: trimetazidine, ethylmethylhydroxypyridine succinate.
It is important to note that once established signs of vascular dementia develop, nootropic and vasotropic therapy completely loses its efficacy. Non-pharmacological measures include smoking cessation and a fat-restricted diet.
Infectious causes of amnesic syndrome
Virtually any brain infection can lead to mental and memory disorders. The outcome of severe infections frequently involves the development of dementia, whereas chronic, slowly progressive processes (HIV, tuberculous meningitis, Creutzfeldt-Jakob disease) may manifest precisely with impairments in mnemonic functions.
The specific nature of the disorders is determined by the rate of progression, severity of intoxication, and the degree of brain structure involvement in the pathological process.
Cerebral syphilis (meningovascular syphilis)
Develops 5 or more years after infection (lues cerebri). This inflammatory disease affects the cerebral vessels and meninges.
The prodromal period is characterized by escalating asthenia: rapid fatigability and memory decline. Subsequently, against the background of organic brain damage, pronounced psychopathological manifestations emerge:
- Korsakoff's amnesic syndrome.
- Epileptiform seizures.
- Delusional psychoses (most commonly hypochondriacal delusions or delusions of jealousy).
- Prolonged depressions.
An early onset of microstrokes is characteristic, after which functions may partially recover. However, recurrent hemorrhages rapidly lead to a picture of lacunar dementia. Timely treatment halts progression, but in later stages, a persistent mental defect is formed.
General paresis
Syphilitic meningoencephalitis (paralysis progressiva alienorum), characterized by direct damage to the brain parenchyma. The disease manifests 10–15 years after infection.
Dynamics of mnemonic and intellectual disorders:
- Initial stage: pseudoneurasthenic symptoms, reduced critical insight, slurred speech.
- Full-blown phase: severe personality changes, complete loss of critical insight. Patients commit absurd actions, become disinhibited, lose belongings, and are easily suggestible.
- Stage of total dementia: severe intellectual impairment with a continuous progression of memory deficits. Patients do not understand the essence of tasks, lose abstract thinking, fail to notice their mistakes, and exhibit euphoria.
Several clinical forms are distinguished, among which the demented form currently predominates (about 70% of cases), characterized by intellectual and memory disorders without pronounced affective disturbances.
Briefly: answers to topical questions
What clinical forms of general paresis are distinguished in psychiatry?
In psychiatry, four clinical forms of general paresis are distinguished, determined by the patient's individual characteristics.
- Demented form — predominance of intellectual disorders without accompanying mood disturbances.
- Expansive form — accompanied by delusions of grandeur with absurd ideas of material wealth.
- Depressed form — characterized by depressed mood, ideas of self-deprecation, and hypochondriacal delusions.
- Paranoid form — manifested by distinct ideas of persecution and isolated hallucinations.
Damage to which brain structures underlies organic amnesic syndrome?
The development of organic amnesic syndrome is based on damage to the hippocampus or functionally related structures. The primary cause of such memory impairments is damage to the anatomical formations comprising the Papez circuit. The nature and type of resulting mnemonic disorders directly depend on the precise topography (location) of the lesion within these areas.
Class and exam questions
Does it make sense to prescribe nootropics in established vascular dementia?
No, according to clinical data, in stable signs of vascular dementia, nootropic and vasotropic therapy are ineffective.
What is the main difference between cerebral syphilis and general paresis?
In cerebral syphilis, vessels and meninges are primarily affected, leading to lacunar dementia. General paresis destroys the brain tissue itself, causing total dementia.
Why is the use of typical TCAs dangerous in vascular brain pathologies?
Typical tricyclic antidepressants are contraindicated in such patients due to the high risk of severe cardiac complications.
What else to study on this topic
- Features of managing acute psychoses and insomnia in patients with organic CNS lesions
- Specific forms of general paresis (expansive, depressed, paranoid)
- Differential diagnosis of cerebral syphilis and cerebral atherosclerosis
- Neurological symptoms in neurosyphilis (Argyll Robertson pupil, anisocoria)
- Psychosomatic nature of hypertensive crises and visual illusions
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