The neurological features of JSRD include hypotonia, ataxia, developmental delay, intellectual disability, abnormal eye movements, and neonatal breathing dysregulation. [ncbi.nlm.nih.gov]

delay and multiple congenital anomalies. [centogene.com]

Discussion The incidence of JS has been estimated to be between 1/80,000 and 1/100,000 live births. 8 The cardinal neurological features of JS are hypotonia that evolves into ataxia and developmental delay. [dovepress.com]

These problems often emerge in temperament, hyperactivity, and aggressiveness. Careful examination of the face, especially in infancy, shows a characteristic appearance. [rehabpub.com]

In some cases, tremor has been reported [ 20 ]. [ojrd.biomedcentral.com]