MYONET - Atlas Musculature Orofacial System

Atlas Musculature: Physiology, I

Erhard Thiele     012e

Atlas Musculature Inventory

MYONET.TOTAL PROGR CONTENTS

Abb. 19: Fibre Course as per Embryonic Development -   Abb. 20: Fibrwe Course as per Topography

To make the comparison with the wheel spoke structure more valid we will have to allow the material of the elastic tracks to be optionally elastic pliable, to show as rigid and, more over, to be actively contractible. From this the following combination options are resulting  [The Orbicularis ring being the central hub / a second possibility of viewing would be to make the Modiolus at the mouth corner the centre]  The padded hub contracts while the spikes stay rigid. For the mouth slit results a sort of purse cord closure carried out more or less strongly as, for example when uttering the vowel 'o' (phonetically: [o]*) when whistling or blowing up a balloon. If we now adjust the spokes in the elastic mode the closure more resembles that of a sack where a lace is wound around. This will form a sort of trunk which carried out in a more sturdy way this one being not so air tight as the one mentioned before allowing a fine air stream we use to blow out a candle or cool the soup. If we now tension in a third version spokes and hub we get the trumpet position. The purse cord closure mentioned above gets tightly pressed on its base (incisors) which enables a meticulously dosed dispensing of an air stream. Carrying on with pictures from music instruments: Tensioning the hub tightly while loosening the spokes creates the picture of the trombone angel. Next the hub is fixed in a rigid position, the spokes being strongly tensioned. This results in a slit closure tending more to a broad grin. And as we just started grinning we, now, may tighten the different spokes in a variably strong manner. All sorts of grins from derogatory to meek appear  (s. Gray [58]). All this can be carried out symmetrically or unilaterally (crooked smile).

Only in such a crude schematic order multiple combination possibilities are resulting; in free combination the numerating becomes most difficult. The great diversity arises from the combination possibilities of contraction of single spokes (additionally uni- or bilateral). Here a further has to be included. Respecting the fact that muscle tracks are superimposed upon others the above numerated two dimensionally, in a plane, proceeding actions are varied by a three-dimensional component. If a muscle placed more deeply gets tensed and additionally another one situated slanting above it these two vectors will result in a centripetally running resultant; as well the converse variation is practicable. Thus we can make a muscle wave run in a circle around the mouth slit by witch practically a lens may be pressed around in a circle round the frontal Vestibulum. Imagining the polyfunctional controllability we may guess what a multicoloured bunch of disorders is waiting for us to be identified. This will have to be discussed in a following chapter. At first  some muscles described in the systematic are compiled in the given follow-up with their functional specialities. At the same time, just to emphasize it, we will keep in mind that the muscle actions of a patient in the individual case have become a facial feature forming steady state and so are embodying the noxious disbalance. We should now still remember that with the embryonic development induced partitioning of the planar skin muscle genetic variations are occurring and, that we are able to differentiated train, like the pianist his single fingers, the single orofacial muscles ( or neglect them; all this multiplying the diversity of functions and failures.

On the „Functional Anatomy“ of the Oral Fissure

Till now presumably the anatomical factors have been described. The following text will try to elucidate how the textural structures of the musculature around  the oral fissure are functionally grouped.  In this connection the circular arrangement of the muscle fibres within the Orbicualris appears characteristic   It, though, forms no complete muscle ring as the ring structure shows a bridging with the Filtrum below the nasal septum and in the mouth corners through the irradiating muscular meshwork of the radial muscle tracks which generally are adjusted antagonistic towards the Orbicularis resulting in a manifold variability of its contractions.

 It however forms no complete muscle ring but the ring structure shows a bridging in the Filtrum beyond the nose septum and in the moth angles from the intertwining muscle network of the radial musculature which is generally aligned antagonistically towards the Ortbicularis and, as said, varying its contractions in a broad range. Matter of this discussion should rather not be the anatomical composition of the Orbicularis but its layering as it becomes visible functionally. Envisioning the course of the contraction/innervation of the muscle complex in the sequence of the muscle function exercise  ,O’ – CHERRY MOUTH– TRUNK  it becomes evident that we are able to activate three concentric rings, separately or collectively. This is also shown in the picture 20.3. If the central, innermost ring gets contracted the oral fissure can be bundled up nearly  dot-shaped to form an ,O'. If, now, the medial ring, which we imagine between the outer and the inner, is additionally contracted this will push the inner, contracted ring forward rostrally forming a ,knob' out of the lips, the CHERRY MOUTH. If now, furthermore, the peripheral, outer ring contracts as well, this pushes the two former, medial and central, forward and a sort of 'TRUNK ' emerges. If, then, only the outmost ring stays contracted the two more central parts ,bulge' or are swaged forward and a formation results similar to if a potato sack is bundled up a handbreadth below the rim = TIED-UP SACK. These formations can be combined randomly with one another then be pulled to and fro  by the "wheel spokes" of the starlike intertwining muscle tracks. Under this perspective the common anatomical classification in sagittal direction of a planar superimposed layering on the other from outside to inside (apple rings) comes  rather less to one's mind (see schematic drawing below). The functional movability rather reminds to an onion bulb formations.

*1 The single speech sounds are determined after the symbols of the Association Phonetique Internationale: