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Showing posts with label cause. Show all posts
Showing posts with label cause. Show all posts

October 30, 2011

Why Does the Nose Whistle in Some People?

Though most people like the professional nose whistler shown here require an instrument to enable the nose to whistle, in others it occurs naturally due to unique anatomic features within the nose.

Why might someone's nose whistle?

Septal Perforation

The most common reason it may occur constantly is due to a hole in the septum (septal perforation). The septum is a wall that divides the right nasal cavity from the left side. Normally, it should be straight and without any openings.

However, when a hole is present in the septum and it is in just the right size and place, whenever air is breathed in and out the nose, it will whistle. In this situation, the hole is the "window" of the whistle and the nose itself is the mouthpiece.

Correction of this problem is by either closing the hole (septal button or surgery) or making it bigger such that the aerodynamics eliminate the conditions conducive to nasal whistling. As an FYI, surgical correction of a septal perforation is quite difficult.

Septal Deviation and Some Nasal Congestion

The other situation when the nose may whistle, but only intermittently, is when there is a deviated septum. In this scenario, the septum rather than being straight, it is slightly crooked to one side making one side more narrow than the other.

Add some slight swelling of the nasal lining such that the opening of the nose is restricted to just right size and shape, and it may whistle.

This type of nasal whistling is akin to grass whistling (blowing between two thumbs holding a blade of grass).

Thankfully, the nasal conditions that lead to nasal whistling is quite rare and requires the perfect storm of just the right amount of septal deviation with just the right amount of nasal congestion.

As such, correction of this problem is fairly easy as one needs to change either the congestion causing the nasal lining to swell with a nasal spray or anti-histamine OR fix the deviated septum. If the inferior turbinates are enlarged, they can be reduced in size as well.

Of course, one can take this unusual condition and make it a positive feature worthy of a concert hall... WITHOUT the assistance of any instrument!


September 30, 2011

Not All Spinning Motions Cause Dizziness

In one of the stranger research projects I've encountered in awhile, French scientists reported on why in the sport of discus throwing, athletes tend to feel more dizzy than those who hammer throw.

Whether discus or hammer throwing, both require spinning on part of the athlete before letting the discus/hammer go for long distances.

59% report dizziness with discus throwing, but none with hammer throwing. Why?

This occurred even among athletes who did both sports eliminating individual susceptibilities to dizziness.

Based on slow-motion video analysis, it was conjectured that visual bearings can be used more easily with hammer throwing than during discus throwing. Moreover, less foot contact with the ground for ground-body tactile feedback and generation of head movements liable to induce motion sickness from acceleration were felt to be contributing factors.

How do these findings translate to patients who are dizzy?

1) Visual bearings - Fixate on objects that you know to be still
2) Increase body-ground contact - Wear flat shoes instead of stiletto heels as well as cane/walker use
3) Minimize sudden turning head motions - Turn with the body rather than the head, or turn the head slowly

Of note, this research project won the 2011 Ig Nobel Prize for Physics.

Reference:
Dizziness in discus throwers is related to motion sickness generated while spinning. Acta Otolaryngol. 120 (3), 390-5.


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