Impaired tool related action in ideomotor apraxia is normally ascribed to loss of sensorimotor memories for habitual actions (engrams), but this account has not been tested against a hypothesis of a general deficit in representation of hand-object spatial relationships. Rapid reaching for familiar tools was compared with reaching for abstract…

Eighty blindfolded healthy female subjects participated in an active and a passive straight-ahead pointing task to study the estimation of the subjective sagittal middle in the presence or absence of an active haptic exploration. Subjects were to point straight-ahead with their left or right index finger starting from different right- or…

The purpose of the present study was to determine whether infants categorized as demonstrating good or poor neuromuscular integrity (voluntary motor abilities reflecting movement coordination) would show differences in use of sensory motor schemas. Subjects were 26 full-term (10 males, 16 females) and 10 premature infants (6 males, 4 females)…