#speech disorder

• Acataphasia — A severe neuropsychological speech disorder characterized by the patient's inability to formulate syntactically and grammatically correct sentences, whereas the ability to pronounce isolated words and the comprehension of their meaning remain intact. This symptom typically arises from focal brain lesions or specific neurodegenerative conditions, leading to fragmented, agrammatic, and incoherent expression.
• Aphimia — A specific form of motor aphasia characterized by the loss of the ability to execute the articulated movements required for speech, while comprehension and the peripheral vocal apparatus remain intact. In clinical neurology, aphimia is caused by focal lesions in the left frontal lobe.
• Aglossia — An extremely rare congenital malformation characterized by the total anatomical and structural absence of the tongue. This embryonic developmental anomaly severely impairs the vital functions of deglutition, respiration, and mastication, as well as the functional capacity to articulate speech sounds and spoken language.
• Agrammatism — A neurological language disorder commonly associated with Broca's aphasia, characterized by the loss of the ability to produce grammatically correct sentences; patients exhibit a telegraphic speech style, omitting functional words such as prepositions, articles, and conjunctions.
• Alalic — Pertaining to alalia, relating to alalia, or affected by this pathological language disorder; characterized by the structural or functional inability to speak and articulate words, although intellect, auditory function, and peripheral speech organs are fully intact. In clinical terms, it describes the specific symptomatology of a patient (usually a child) who cannot develop speech due to developmental dysfunctions or lesions within the higher cerebral nervous centers.
• 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.
• Anaphimia — A rare form of language disorder or historical terminological variant sometimes used in clinical semiology to describe the structural inability or extreme difficulty to express emotional states, feelings, or ideas through coherent words; it can also be encountered in old neurological nomenclature as a contextual equivalent for certain forms of aphasia or verbal articulation disabilities associated with brain lesions.
• 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.
• Apsithyria — A very rare medical and psychiatric term historically used in old clinical treatises as a variant or transcription error for 'apsithyria'; a severe form of hysterical aphasia or conversion disorder where the patient completely loses the ability to whisper or emit any vocal sound, although the structural speech apparatus is intact.
• Non-syllabicity — 1. (In phonetics) The character or state of a spoken sound (vowel or consonant) of not forming a syllable by itself or not constituting the structural center of a syllable; non-syllabicity. 2. (In speech pathology) A rare speech disorder related to aphasia, characterized by the inability to correctly pronounce or combine isolated syllables to form coherent words, while still retaining the capacity to utter individual sounds.
• Ataxophemia — A rare neurological and speech disorder manifested by a lack of coordination in the muscles involved in phonation, leading to defective articulation, rhythm irregularities, and jerky or incoherent speech. The condition is not caused by an intrinsic weakness of the vocal apparatus, but by a structural dysfunction in the transmission of motor nerve impulses, disrupting the harmonious sequence of emitted sounds.
• Audimutitas — A neurological condition or rare developmental disorder characterized by the total or partial absence of articulated speech (muteness) in an individual who possesses a perfectly functional auditory apparatus and normal intelligence; alalia. This pathology is due to dysfunctions in the cerebral language centers or psychogenic causes, where the individual hears and understands but cannot produce verbal speech.