#brain

• Alcmaeon — The Romanian form of the ancient Greek name Alkmaion; it primarily refers to Alcmaeon of Croton (5th century BCE), a famous pre-Socratic philosopher and medical theorist, historically recognized as a pioneer of anatomical dissections and for his revolutionary hypothesis that the brain is the central seat of thought and sensory perception. In mythology, he is one of the Epigoni, son of Amphiaraus, structurally trapped by fate in the tragedy of matricide.
• Alexic — Pertaining to alexia, belonging to alexia, or affected by this neurological disorder; a person who has lost the ability to read and decode written language due to a cortical brain lesion. In medical semiology, the term characterizes the cognitive behavior or specific deficits within a complex aphasic syndrome, where the recognition of symbolic graphic signs is completely compromised.
• Alexic — The feminine form for alexic, designating a female patient or person affected by alexia (loss of reading ability due to a brain lesion); also, it describes a manifestation, disorder, or pathological state presenting the characteristics of alexia, marked by the impossibility of decoding written graphic signs.
• Alexia — A severe neurological disorder characterized by the total or partial loss of the ability to read and comprehend written language, caused by an acquired lesion in the brain structures involved in visual-linguistic processing (specifically in the left parietal or occipital lobe). Unlike illiteracy, the condition occurs in individuals who previously possessed the ability to read, and unlike dyslexia, it is an acquired condition rather than a developmental disorder.
• The alexias — The definite articulated feminine plural form of the noun alexia, designating collectively and specifically all the types, manifestations, or identified clinical cases of loss of the ability to read and comprehend written text due to a cortical brain lesion. In medical literature, the term individualizes the forms of word blindness studied within a specific patient group or nosological framework.
• Alexia — An extremely rare specialized medical term used to describe the pathological inability or severe difficulty to read or understand written text, often conceptually correlated with alexia or agraphia; by extension, in some old psychopathology papers, the term indicates a focal neurological disorder resulting from a brain lesion in the left parietal or occipital lobe, affecting the symbolic processing of graphic signs without altering visual acuity.
• Allocheiria — A graphic and clinical variant of the term 'allocheiria'; it represents a neurological disorder of somatic sensitivity where a patient localizes a tactile, thermal, or painful stimulus on the opposite side of where it was actually applied. This structural phenomenon reflects a severe dysfunction in signal transmission and processing within the secondary somatosensory cortex or the parietal lobe, often associated with hemispatial neglect.
• Allophasia — A language or speech disorder characterized by the utterance of incoherent, inappropriate words or phrases that are completely different from those the patient structurally intends to express. This pathological condition typically appears as a symptom in sensory aphasias, severe mental confusion states, or following focal lesions in the dominant cerebral hemispheres, disrupting communication coherence.
• Alzheimer's — The name of a progressive and irreversible neurodegenerative disease, representing the most common cause of dementia in older adults, clinically characterized by memory loss, severe cognitive decline, and behavioral changes; a medical eponym structurally named in honor of the German psychiatrist and neuropathologist Alois Alzheimer. This condition is pathologically marked by the accumulation of beta-amyloid plaques and neurofibrillary tangles in brain tissue, leading to neuronal destruction and cortical atrophy.
• Ambidextrous (female) — A woman or female individual who has the innate or acquired ability to use both hands (or both feet) with equal skill, precision, and ease. As an adjective, it qualifies a feminine noun, indicating a symmetric character and a dual motor capacity.
• Ambidexterity — The ability, faculty, or quality of using both hands (or both feet) with equal ease, skill, and precision in executing various actions. Structurally and neurologically, this physiological condition is linked to atypical or incomplete brain lateralization, with hemispheres controlling motor movements symmetrically.
• Dizzy spell — A transient sensation of vertigo, lightheadedness, or loss of balance; a mild or brief manifestation of dizziness. In a figurative, familiar, or pejorative sense, it describes a scatterbrained, reckless, absent-minded, or flighty person who acts without structural clarity in thought.
• Amygdala — An ovoid anatomical formation consisting of lymphoid tissue or nerve nuclei. In general anatomy, it most frequently refers to the palatine tonsils, located in the oropharynx, serving as a protective immune barrier. In neuroanatomy, the amygdala (amygdaloid body) represents a key structure of the cerebral limbic system, located in the temporal lobe, essential for processing emotions, such as fear, and for storing emotional memories.
• Amygdaloid — Resembling an almond in shape; ovoid and slightly flattened. In neuroanatomy, it describes the amigdaloid body (or cerebral amygdala), a deep nuclear structure essential for emotional processing. In mineralogy, it refers to the texture of a volcanic rock whose vesicles have been subsequently filled with secondary minerals, forming oval nodules.
• Memories — The plural form of the noun 'amintire'; the totality of images, ideas, impressions, or knowledge structurally stored in memory and recalled into consciousness through the process of recollection. The term refers to the collection of experiences lived by an individual or a community, constituting a fundamental element in literature and memoirs.
• Amorphognosia — A cognitive neurological disorder of the agnostic type, consisting of the patient's inability to recognize, through tactile palpation, the general shape or geometric dimensions of objects, in the absence of elementary skin sensory deficiencies. This structural defect indicates a focused lesion within the contralateral parietal lobe of the cerebral cortex.
• Amusia — A congenital or acquired neurological disorder (following a brain injury) characterized by the partial or total inability to recognize, hum, reproduce, or understand musical tones, rhythm, and melodies, despite biological hearing and general intellectual functions remaining perfectly intact; tone deafness. This structural phenomenon affects the cognitive processing of sound structures in the secondary auditory cortex.
• Amusia variant — An extremely rare medical and neurological term, sometimes used as a variant or graphical error for 'amusia' or as a niche synonym for the congenital or acquired inability to correctly perceive and process rhythmic structures and tone elements of speech or music. It represents an anomaly in the central auditory analyzer affecting the decoding of complex acoustic signals.
• Analogrif — A specialized term in enigmatics designating a word game or a puzzle based on the structural modification of a term by replacing letters according to an analogical algorithm or a pre-established grid of correspondences. This type of puzzle or structural anagram tests the player's ability to identify symmetrical linguistic patterns and reconstruct the hidden word using proportional semantic clues.
• Anarthria — An extreme clinical form of dysarthria, characterized by the complete loss of the ability to articulate words and pronounce speech sounds, resulting from a severe lesion of the central or peripheral nervous system (such as strokes, head traumas, or neurodegenerative diseases). In neurological semiology, this structural disorder exclusively affects the motor function of the muscles involved in phonation, while language comprehension and writing capabilities remain intact.