Memory disorders are problems with storing, recalling or remembering information. They can include difficulties in remembering names, dates or events.

An ischemic stroke is a condition in which the blood flow to a part of the brain is blocked, leading to oxygen deprivation and damage to brain cells. Symptoms include sudden weakness, difficulty speaking, paralysis, and loss of balance.

Learning difficulties refer to challenges in acquiring knowledge and understanding material, which can arise from various causes, such as attention and concentration disorders.

Neuroprotection is a process or action aimed at protecting neurons from damage, degeneration or oxidative stress, which can lead to neurodegenerative diseases such as Alzheimer's or Parkinson's.

Vision problems are difficulties in perceiving images, such as blurred vision, eye pain, double vision or sensitivity to light, resulting from refractive errors or eye diseases.

Dizziness is the sensation of spinning or losing balance, which can be caused by issues with the inner ear, low blood pressure, nervous system problems or other conditions. It is often accompanied by nausea.

Balance problems are difficulties in maintaining body stability, which can result from disorders in the vestibular, neurological, cardiovascular or musculoskeletal systems.

Concentration disorders are difficulties in maintaining focus on a single task, which hinder the completion of tasks, learning or daily functioning. They manifest as easy distractibility, forgetfulness, difficulties in organizing work and decreased efficiency.

Multiple sclerosis (MS) is a chronic autoimmune disease in which the immune system attacks the myelin sheath of nerve fibers, leading to damage in the nervous system. It manifests as motor, sensory disturbances and fatigue.

Dementia is a syndrome of symptoms associated with the progressive impairment of cognitive functions such as memory, thinking, orientation, language and decision-making abilities. The symptoms worsen over time, leading to a loss of independence.

Jet lag is a physical phenomenon related to the disruption of the body's circadian rhythm, which occurs after long travel across time zones, leading to fatigue and sleep problems.

Low energy is a state of overall fatigue, weakness, and lack of vitality, which can result from overwork, stress, poor diet, lack of sleep or health problems.

Apathy is a state of emotional indifference, lack of interest, and motivation to take action.

Memory problems are difficulties in remembering, storing or recalling information. They can result from stress, fatigue, aging or diseases such as dementia.

Erectile dysfunction is a condition in which a man has difficulty achieving or maintaining an erection sufficient for sexual intercourse.

Decreased concentration is difficulty focusing on a single task, leading to easy distractibility, forgetfulness and reduced efficiency in completing tasks. It can be caused by fatigue, stress, emotional issues, lack of sleep or neurological disorders.

Cerebral ischemia is a condition in which the blood flow to the brain is reduced or interrupted, leading to a lack of oxygen for brain cells. This can result in tissue damage and neurological disorders. Ischemia can be caused by an embolism, thrombosis or narrowing of blood vessels.

Alzheimer's disease is a progressive neurodegenerative disorder that causes memory loss, impaired thinking and disorientation. It is the most common cause of dementia in older adults.

Headaches can have various causes, such as stress, migraines, or muscle tension.

Fainting is a brief loss of consciousness, usually caused by a drop in blood pressure, brain hypoxia, or other health issues. It is characterized by dizziness, weakness and a lack of response.