The document discusses terms related to sensation and speech in the nervous system. It defines anesthesia as the absence of pain or sensation that can result from disease, injury or administration of anesthetic substances. It also defines paresthesia as abnormal burning or tingling sensations, often described as numbness, and hyperesthesia as excessive sensitivity to sensory stimuli like pain or touch. Additionally, it defines aphasia as the absence or impairment of communication through speech, writing or signs due to brain dysfunction, and dysphasia as impaired speech from brain lesions or disorders.

1. Chapter 12: Nervous SystemBy: Sheralyn Sulit

2. Suffix -esthesiaPertaining to sensation.Anesthesia – absence of pain or sensation.Anesthesia can be a partial or complete lossof sensation with or without the loss ofconsciousness, resulting from disease, injuryor administration of an anesthetic substance by injection or inhalation.Paresthesia – abnormal sensations such as burning or tingling.Often described by patients as numbness oras a prickly, stinging or burning feels. Commonwith the upper and lower extremities. Hyperesthesia – excessive sensations.Increased sensitivity to sensory stimuli such aspain or touch.

3. Suffix -phasiaPertaining to speech.Aphasia – the absence of impairment of the ability to communicate through speech, writing or signs because of brain dysfunction.Dysphasia – impairment of speech resulting from a brain lesion or neurodevelopmental disorder.