. Operative surgery, for students and practitioners . ive tissue, is lodged in thesubmaxillary triangle, beneath the deep cervical fascia. Connective-Tissue Spaces Beneath the Deep CervicalFascia. Prcevisceral Space.—This space corresponds to a mass ofloose connective tissue that is situated in front of the trachea andthyroid gland and beneath the deep cervical fascia and depressormuscles of the hyoid bone. If an opening is made in the deep fascia and a probe introducedinto this space, it may be readily forced down into the mediastinum,and a collection of pus in this space may readily gravitat
. Operative surgery, for students and practitioners . ive tissue, is lodged in thesubmaxillary triangle, beneath the deep cervical fascia. Connective-Tissue Spaces Beneath the Deep CervicalFascia. Prcevisceral Space.—This space corresponds to a mass ofloose connective tissue that is situated in front of the trachea andthyroid gland and beneath the deep cervical fascia and depressormuscles of the hyoid bone. If an opening is made in the deep fascia and a probe introducedinto this space, it may be readily forced down into the mediastinum,and a collection of pus in this space may readily gravitate along thesame route into the mediastinum with fatal results. Retrovisceral Space.—This is the recess between the pharynxand oesophagus in front and the vertebral column behind; it reachesfrom the base of the skull down into the chest. Pus in this spacemay readily find its way down along this path into the chest. Vascular Space.—Upon either side of the pharynx and oesoph-agus and the larynx and trachea the carotid artery and its adjoining VAM. Fig. 76.—Section through the Neck, Level of Sixth Cervical Vertebra, toShow Arrangement of the Deep Cervical Fascia (Indicated in Red). BP,trunks of brachial plexus; C, complexus muscle; EJ, external jugular vein;E8, oesophagus; LA, levator anguli scapulas muscle; OH, omo-hyoid muscle;P, platysma muscle; PV, prssvisceral space: 1V, retrovisceral space; 8, S1,splenius capitis et colli muscle; 8 A, scalenus anticus muscle; SC, semi-spinalis colli muscle; SH, sterno-hyoid muscle; SM, scalenus medius muscle;88, suprasternal space; 8T, sterno-thyroid muscle; , sterno-mastoidmuscle; 8Y, sympathetic nerve; TP, trapezius muscle; TR, trachea; TY,thyroid gland; V, vertebral artery and vein; VAN, internal jugular vein,carotid artery, and pneumogastric nerve inclosed in a mass of loose connec-tive tissue. SURGICAL ANATOMY OF THE NECK. 125 structures are found. These structures, beside the carotid artery,consist of the internal jugular v
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