The elements of anatomy / by Jones Quain.

  • Quain, Jones, 1796-1865.
Date:
1834
Catalogue details

Licence: Public Domain Mark

Credit: The elements of anatomy / by Jones Quain. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

    174/914 (page 136)
    somewhat resembles that of the letter L, one part being hori- zontal, the other vertical. The horizontal or palate plate of the bone, which is nearly square, and forms the back part of the roof of the mouth and of the floor of the nares, articulates anteriorly with the palate plate of the maxillary bone ; internally it presents a rough thick border which rises up into a ridge, which joins with its fellow of the opposite side and with it forms a groove which receives the lower border of the vomer ; externally it unites at right angles with the vertical portion of the bone; pos- teriorly it presents a thin free border, forming the limit of the hard palate, and giving attachment to the velum or soft palate which projects downwards from it; it is slightly con- cave, and has at the inner angle a pointed process (the palate spine). The superior surface of this plate or process is smooth, and forms the back part of the floor of the nasal cavity : the inferior, which forms part of the roof of the mouth, is un- equal, and marked by a transverse ridge, into which the tendinous fibres of the circumflexus palati muscle are in- serted ; it presents also an oval foramen, being the inferior termination of the posterior palatine canal, which transmits the large descending palatine nerve and accompanying ves- sels ; and farther back, another of smaller size, which trans- mits the middle palatine nerve. At the junction of the horizontal and vertical portions, is situated a thick, rough tubercle {tuberosity, pyramidal process), projecting downwards and backwards. This is marked by three vertical grooves ; the two lateral ones are rough, and receive the inferior borders of the pterygoid plates of the sphenoid bone; the middle one, smooth, corresponds with and completes the fossa between the pterygoid plates. 67. The vertical portion of the bone is flat and thin ; it presents two surfaces; the internal one {nasal) is divided into two parts by a transverse ridge, which articulates with the inferior spongy bone ; the space below the ridge forms part of the inferior meatus, that above it of the middle meatus. The external surface, rough and unequal, is divided by a vertical groove, which is completed into a canal {posterior- palatine canal) by the maxillary bone. The posterior part of this surface articulates with the rough border and nasal