The anatomy of humane bodies epitomized wherein all parts of man's body, with their actions and uses, are succinctly described, according to the newest doctrine of the most accurate and learned modern anatomists / by a Fellow of the College of Physicians, London.

CHAP. XI.

Of the Muscles of the Larynx.

THE Muscles of the Larynx are either common▪ or proper.* 1.1 The common are four; two called par sternothyreoideum, and as many called par hyo∣thyreoideum. The Hyothyreoideum springeth from [ 1] the whole basis almost of the Bone of the Tongue, having a broad and carnous beginning; from whence descending with streight Fibres, and covering all the outside of the cartilage thyreoides, it is inserted into its lowest part. When this is contracted, it draws the buckler-like (or thyreoi∣des) cartilage upwards and inwards, and thereby straitens the Chink of the Larynx. The other [ 2] pair called sternothyreoideum (vulgarly Bronchium) springing from the upper and inner part of the sternum with a carnous and broad beginning, as∣cends with streight Fibres up by the sides of the Wind-pipe (continuing the same largeness and substance) and is at last inserted into the lower side of the buckler-like cartilage, by drawing down which it opens or widens the Chink. Diemer∣broeck assigns clear contrary actions to these Mus∣cles, viz. that the former widens and this latter straitens the rima of the Larynx.

The proper Muscles are in number nine.* 1.2 The first pair is called Cricothyreoideum anticum. This springeth from the fore-part of the cricoides or ring-like [ 1] cartilage, and is inserted into the lateral parts of the Thyreoides. It extends the cartilage and so

widens the rimula, for the forming of a big Voice. Bartholin, from the insertion of the Nerve, says it arises from the thyreoides, and is inserted into the cricoides. Also if this pair be very broad, he says, it may be divided into two pair (which Riolanus has done) and then the second may be called Cri∣cothyreoideum laterale. The second pair is called [ 2] Cricoarytaenoideum posticum, springing carnous from the hinder and lower part of the Cricoides, whose cavity it fills, and ascending with streight Fibres it is inserted with a nervous end into the lower side of the Arytaenoides, which it pulls upward and backward, and thereby opens and widens the Larynx. The third is Cricoarytaenoideum laterale, [ 3] which springeth above from the sides of the Cricoi∣des, with a slender beginning, but growing pre∣sently larger, it is implanted into the sides of the arytaenoides, in that part that the foregoing did not cover. This openeth the Larynx by drawing the cartilages obliquely aside. The fourth pair is cal∣led [ 4] Thyreoarytaenoideum. This is internal, carnous and broad, arising from the fore interior part of the Thyreoides, and is inserted into the sides of the guttalis or arytaenoides, which make the glottis. It draws these Cartilages one to the other and so straitens the Larynx. The fifth and last is reckon∣ed [ 5] to be but one Muscle, and is called Arytaenoides, because it has its rise from the Cartilage so called, namely from its hinder Line, from whence being extended with transverse Fibres, it is also inserted into its sides, and by constringing of it shuts the Larynx.

Notes

• * 1.1

  The com∣mon mus∣cles are four.
• * 1.2

  The proper muscles nine.