Aphasia is a dysfunction of linguistic abilities caused by abnormal neurological conditions like head trauma or stroke. It can affect comprehension or expression and come in sensory (not understanding language) or expressive (unable to form words) forms, sometimes together. Analgesia is a decreased or absent sensation of pain and is the goal of painkillers. There are two types of painkillers - non-narcotic drugs for mild to moderate pain and narcotic (opioid) drugs for severe pain, acting on the central nervous system. Opioids include natural alkaloids from poppies, semi-synthetic drugs created from natural opioids, and fully synthetic drugs.

1. Bio 120 Medical Terminology
Tim Widlic

2. Nervous System

3. Aphasia
•Aphasia manifests as a dysfunction of linguistic abilities, either partial or complete, due to an
abnormal neurological condition.
•Causation: Due to trauma to certain areas of the cerebral cortex, ie, direct head trauma, hypoxia,
cerebrovascular accident, and cancer.
•Types:
•Sensory aphasia – Language is not understood.
•Expressive aphasia – Words cannot be formed or expressed, either partially and/or fully.
•Most commonly both types manifest, to some degree.
•For example: Patient may be able to write but not speak, or vice versa, Additionally, other
deficiencies in language comprehension and production may occur, such as being able to sing
but not speak.
•Can be transient: Occurring as a result of a transient ischemic attack and/or head injury, with
symptoms eventually subsiding, and a return to one’s previous linguistic abilities.

4. Analgesia
•A decreased or absent sensation of pain.
•Is the desired outcome when analgesic medication is administered. Analgesics are
commonly known as “painkillers”.
•Two types:
•Non narcotic: Used to treat mild to moderate pain. Does not alter a patient’s
perception, nor do they produce tolerance nor dependence. Ex: aspirin, Bayer,
Ecotrin; acetaminophen, Tylenol; ibuprofen, Aleve.
•Narcotic: Also known as an opiate or an opioid. Used to treat severe pain.
Acts on the CNS (central nervous system), specifically, the opioid receptors.
Alters the patient’s perceptions, produces tolerance, and potentially,
dependence.
•Natural opiates: alkaloids contained in the resin of the opium poppy,
primarily morphine, codeine, and thebane, but not papaverine
and noscapine.

5. Analgesia
Types of opioids continued…
Semi-synthetic opioids: Created from natural opiates, such as
hydromorphone, hydrocodone, oxycodone, oxymorphone,
desomorphine, diacetylmorphine (heroin), nicomophine,
dipropanoylmorphine, benzylmorphine, and ethylmorphine, and
buprenorphine
Fully synthetic opiods: Such as Fentanyl, pethidine, methadon,
tramadol, and dextropropoxyphene.
Endogenous opioid: Such as peptides, produced naturally in the
body, such as endorphins, enkephalins, dynorphins, and
endomorphins.

6. References:
Fremgen, Bonnie F., Medical Terminology: A Living Language. 4 th. ed. Upper Saddle
River: Pearson, 2009.
Mosby's Medical, Nursing, and Allied Health Dictionary. 6th ed. St. Louis: Mosby,
2002.
Internet sources:
http://en.wikipedia.org/wiki/Aphasia
http://en.wikipedia.org/wiki/Opioid

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