Symptoms of the fragile x syndrome There are several physical and behavioral characteristics that are associated with fragile X however, not every individual has all the characteristics. The following is a list of the most common traits Long narrow face Prominent ears jaw and forehead High arched palate Flat feet Hyperextensible joints Enlarged testicles Mental impairment, ranging from learning disabilities to mental retardation Attention deficit and hyperactivity Unusual speech pattern(fast, fluctuating rate and repetition of sounds) Anxiety and unstable mood Obsessive-compulsive tendencies Autistic-like behaviors or socially engaging and friendly Hand-flapping hand-biting Aversion to be held or touched Motor delays Seizures Heart murmurSymptoms of the fragile x syndrome There are several physical and behavioral characteristics that are associated with fragile X, however, not every individual has all the characteristics. The following is a list of the most common traits: Long narrow face Prominent ears, jaw, and forehead High arched palate Flat feet Hyperextensible joints Enlarged testicles Mental impairment, ranging from learning disabilities to mental retardation Attention deficit and hyperactivity Unusual speech pattern (fast, fluctuating rate and repetition of sounds) Anxiety and unstable mood Obsessive-compulsive tendencies Autistic-like behaviors or socially engaging and friendly Hand-flapping, hand-biting Aversion to be held or touched Motor delays Seizures Heart murmur