<P> Signs and symptoms of ACC and other callosal disorders vary greatly among individuals . However , some characteristics common in individuals with callosal disorders include vision impairments , low muscle tone ( hypotonia ) , poor motor coordination , delays in motor milestones such as sitting and walking , low perception of pain , delayed toilet training , and chewing and swallowing difficulties . Laboratory research has demonstrated that individuals with ACC have difficulty transferring more complex information from one hemisphere to the other . They also have been shown to have some cognitive disabilities ( difficulty in complex problem solving ) and social difficulties ( missing subtle social cues ) , even when their intelligence quotient is normal . Recent research suggests that specific social difficulties may be a result of impaired face processing . The unusual social behavior in childhood is often mistaken for or misdiagnosed as an autism spectrum disorder . Other characteristics sometimes associated with callosal disorders include seizures , spasticity , early feeding difficulties and / or gastric reflux , hearing impairments , abnormal head and facial features , and a mental handicap . </P>
a child born with agenesis of the corpus callosum would have the most difficulty
transferring more complex information from one hemisphere to the other