. Quain's Elements of anatomy. 162 THE AKTICULATIONS OF THE THUNK AND HEAD. upwards in inspiration, forwards and downwards in expiration. The last two ribs, forming-no costo-transverse articulations, move freely backwards and forwards, while the up anddown movement is more limited : the twelfth rib in inspiration is drawn backwards andrather downwards. When the vertebral column is extended, the ribs are raised and separated ;and when the column is bent forwards, the ribs are depressed and brought together. Thecombined movements of the chest-walls in respiration will be considered with the acti
. Quain's Elements of anatomy. 162 THE AKTICULATIONS OF THE THUNK AND HEAD. upwards in inspiration, forwards and downwards in expiration. The last two ribs, forming-no costo-transverse articulations, move freely backwards and forwards, while the up anddown movement is more limited : the twelfth rib in inspiration is drawn backwards andrather downwards. When the vertebral column is extended, the ribs are raised and separated ;and when the column is bent forwards, the ribs are depressed and brought together. Thecombined movements of the chest-walls in respiration will be considered with the actions ofthe thoracic muscles. TEMPORO-MAXILLARY ARTICULATION. The articular surfaces of this joint are the condyle of the lower jaw, which isapproximately a portion of a cylindrical body, with its axis directed from without. Fig. 189. A PORTION OP THE SKULL WITH THE LOWER JAW AND HYOID BONE, SEEN FROM THE OUTER SIDE. (Allen Thomson, afterArnold.) J 1, external lateral ligament of the tempore-maxillary articulation ; 2, a part of the capsuleof the joint ; 3, styloid process ; 4, stylo-maxil-lary ligament ; 5, stylo-hyoid ligament; 6, lessercornu of the hyoid bone with some short liga-mentous fibres attaching it to, 7, the body, and8, the great cornu. inwards and slightly backwards, andthe surface of the squamous portionof the temporal bone extending overthe part of the glenoid fossa in frontof the Glaserian fissure and the articular-eminence formed by the anterior rootof the zygoma. The two are markedlyin congruent, and the temporal surface is much larger than that of the inferiormaxilla. The incongruence is compensated by the interposition of a meniscus
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectanatomy
