APHASIA• Inability to communicate through speech• Due to damage of speciﬁc areas of the brain• Languageinvolves almost the entire area of the association cortex on the left side of the brain
IMPORTANT LANGUAGE REGIONS• Broca’s Area- If a lesion occurs in this area, a person can understand language but has difﬁculty speaking. It can also affect writing, typing, and sign language.• Wernicke’s Area- If a lesion occurs here, a person is able to speak, but in a nonsensical manner, sometimes known as “word salad”. They have a difﬁculty comprehending language.
CAUSES OF APHASIA• Stroke• Head injury• Brain tumor• Infection• Dementia
-ESTHESIASufﬁx pertaining to feeling or sensation
PARESTHESIA• Burning, prickling, tingling, or numbness- “pins and needles”• Temporary paresthesia occurs when sustained pressure is placed on a nerve, such as when a person keeps his legs crossed for too long- will fade when pressure is released• Chronic paresthesia is a sign of neuron malfunction or nerve damage
CAUSES OF CHRONIC PARESTHESIA• Stroke • Whiplash• Transient ischemic attack • Hypothyroidism (TIA) • Fibromyalgia• Multiple sclerosis (MS) • Tumor pressing against brain• Lyme disease or spinal cord• Diabetes