Thursday, August 2, 2007

Coughs

Yes, I'm gonna talk about coughing because me, is coughing, and me being me, researched a bit on coughing and I found that there are 2 types of cough, subconscious and conscious types.

Subconscious cough occurs when foreign substances impinge in certain nerve fibers in the larynx and larger airways. It is often rapid, forceful, and can occur even when the subject is anesthetized which means even if when you're asleep you can cough. It is a defense mechanism to prevent obstruction in the airway. It is most strongly triggered by touch and rapid increases in local H+ concentration which is acidic and meaning when there is an infection to the throat you cough. This cough reflex can be primed by allergen inhalation in sensitive subjects. It is generally not directly stimulated by inflammatory mediators, tracheal stretch or local muscle contraction.

Conscious cough occurs because we think we have to cough because of a sense of local irritation, whether or not there is actually something impinging on local cough fibers. This is the sort of cough that may linger after certain viral respiratory infections or with COPD(no idea what is this) or asthma. This is the one that happens when you catch a cold and sick and it does not occur in anesthetized individuals. The activated C fibers sensitize the cough reflex and can be physically apart (e.g., lung tissue, esophagus) from the area where coughing starts There are cough receptors in the large airways but not in the peripheral airways. However, stimulation of C fibers in the peripheral airways appears to sensitize the cough receptor so that less stimulation of the latter is needed to induce a cough. That means when you get the itchy feeling, you cough.

This was taken from www.aaaai.org

Today was the official launch of the Honda Civic Type R and Honda Civic Hybrid will check it out when my parents wanna go . Today is also the last day for the Rapid Penang's free ride and after much consideration, I'd take the bus when it's not free so the prices will be known to all and the bus won't be 'sandwich-ing me'

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