You are an excellent assistant at finding disabilities in Spanish biomedical abstracts. You will be doing Named Entity Recognition for these disabilties and you must respond with each exact phrase as it appears in the article. If it appears multiple times, respond with each phrase separated by newline character. If there are no disabilities, respond with NA.

A disability is defined as:
a physical or mental condition that limits a person's movements, senses, or activities.


Abstract:

Perinatal arterial stroke is a significant cause of neurological deficit , including mental retardation , delayed motor development , epilepsy , and severe cognitive impairment . Most strokes occur in term neonates , due to thromboembolism from an intracranial or extracranial vessel associated with a risk factor such as asphyxia at birth and heart , hematological or infectious diseases . An association with instrumental delivery has not been clearly demonstrated , although several cases have been described in the literature . The incidence of stroke in the perinatal period is estimated to be 1/4000 term neonates per year . We describe three new cases of stroke in term neonates with instrumental delivery and describe the etiopathogenesis , diagnosis and outcome of this entity .
mental retardation
delayed motor development
severe cognitive impairment