Agraphia.—Lack of power to write words.
Alexia or Word-blindness.—Lack of power to understand words written.
Anæsthesia, or the loss of sensation generally, must be distinguished from analgesia, or the loss of the sense of pain alone.
Analgesia.—Insensibility to pain.
Aphasia.—Incapacity of coherent utterance, not caused by structural impairment of the vocal organs, but by lesion of the cerebral centres for speech.
Aphonia.—Incapacity of uttering sounds.
Automatic.—Used of mental images arising and movements made without the initiation, and generally without the concurrence, of conscious thought and will. Sensory automatism will thus include visual and auditory hallucinations. Motor automatism will include messages written and words uttered without intention (automatic script, trance-utterance, etc.).
Automnesia.—Spontaneous revival of memories of an earlier condition of life.
Autoscope.—Any instrument which reveals a subliminal motor impulse or sensory impression, e.g., a divining rod, a tilting table, or a planchette.
Bilocation.—The sensation of being in two different places at once, namely where one's organism is, and in a place distant from it.