Impaired memory

A disturbance of the ability to encode, store, or retrieve information, manifesting as reduced capacity for new learning or recall of previously acquired material. It ranges from benign forgetfulness to severe cognitive disorders, and may be caused by psychiatric disorders (stress, anxiety, depression), medications (sedatives, antidepressants), vitamin B12 deficiency, urinary tract infection, deliruium, hypothyroidism, liver/kidney failure, sleep apnea, alcohol abuse, recreational drug use, neurodegenerative diseases (Alzheimer's disease, dementia with Lewy bodies), stroke, traumatic brain injury, and brain tumor.