Last updated: April 22, 2019
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Why Do We Yawn Essay, Research Paper

Why Do We Yawn?

The definition of oscitance is to open the oral cavity involuntarily with a drawn-out, deep inspiration of air. Yawn is a normal response to tire and drowsiness, but inordinate oscitance can be caused by a vasovagal reaction and may bespeak a bosom job. Normal oscitance may be induced to cleanse the encephalon.

At the deepest portion of the breath when the lungs have the greatest force, the lungs fill up the ribcage, so lift the ribs.The ribs lift the spinal column and the force is transferred from the top of the spinal column to a bone of the skull called the occipital bone. The occipital bone forms most of the place for the encephalon, and it is pushed upward.

At the same minute the to the full expanded lungs push off from the ribs and the bronchial tube are forced apart or off from each other.The bronchial tube are attached to the bronchial tube tubings doing them to draw down on the windpipe.

The windpipe pulls down on the thyroid. The thyroid is attached to the hyoid bone by the thyrohyoid membrane, which pulls equally on the hyoid bone. The hyoid bone, which is being pulled downward, is attached to the skull by ligaments and musculus at two points called the styloid procedure of the temporal castanetss.

The two temporal castanetss are on each side of the occipital bone. The styloid procedures are the two thorn-like bulges where the musculuss and ligaments attach from the hyoid bone to the temporal castanetss. While the temporal castanetss are being pulled downward on each side of the occipital bone, the occipital bone is being pushed up betw

een them.

This action puts force per unit area on the encephalon.

The jaw, the lingua, and the hyoid bone together with many musculuss work to draw down on the temporal castanetss during deep inspiration with the jaw opened broad. There are many musculuss involved in this including the sternohyoid, the omohyoid, the sternothyroid, the thyrohyoid, the stylohyoid, the digastric, the mylohyoid, and the geniohyoid.

The occipital bone and the spinal column are like a Piston forcing up between the temporal castanetss that are being pulled downward. The force per unit area that is put on the encephalon within the skull has the affect of speed uping the normal cerebrospinal fluid soaking up procedure.

Cerebrospinal fluid is created by the choroid rete found in the ventricles of the encephalon. Cerebrospinal fluid or CSF is a clear liquid that is believed to protect the encephalon from daze and to nurture the encephalon and take encephalon waste merchandises. CSF flows from the ventricles and surrounds the encephalon and spinal cord. CSF is known to be absorbed by the arachnidian villi / venous fistulas method. We produce about a pint of cerebrospinal fluid per twenty-four hours but we merely have the capacity to keep about one 4th of that, so our cerebrospinal fluid is replaced several times per twenty-four hours during normal circulation.

The flow of the CSF has much to make with the intercranial force per unit area, which is different from the blood force per unit area of the organic structure. When yawning puts force per unit area on the encephalon, the CSF is forced through its soaking up tracts at an accelerated rate taking encephalon waste merchandises with it.

Yawning cleans the encephalon.