Aids to anatomy.

  • Charles Fagge
Date:
1912
Catalogue details

Licence: Public Domain Mark

Credit: Aids to anatomy. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    \ maxilla(F)—angle and inner surface of ramus of inferior maxilla(TA) (Inferior maxillary). [Muscle of mastication; elevates and draws lower jaw forward.] On muscle are inferior dental and gustatory nerves, internal maxillary and inferior dental arteries, and internal lateral ligament of jaw. SUPERFICIAL CERVICAL REGION. Platysma myoides : clavicle and acromion, fascia covering deltoid, pectoralis major, and trapezius(F)—Inner fibres. Blend with opposite platysma. Outer fibres.—Lower jaw, prolonged to angle of mouth and cheek(F) (Facial). [Feeble depressor of jaw ; moves skin of neck and maintains its contour.] The ^ higher fibres of this muscle form the risorius. \ Sterno-cleido-mastoid: Inner head. Upper and anterior part of ist piece of sternum(T). Outer head. Inner ^ of superior surface clavicle(F)—external surface of mastoid pro- cess from base to apex(T), and outer § of superior curved line of the occiput(A) (Spinal accessory, Deep branch of 2nd cervical), [(a) Each side acting alone rotates face to opposite shoulder and bends neck to same side; (b) raises clavicle, and so aids forced inspiration.] Forms anterior boundary of posterior, and posterior boundary of anterior triangles of neck. Clavicular origin conceals : anterior scalenus, omo-hyoid. Sternal origin conceals: depressors of hyoid bone, cervical lymphatic glands, great cervical vessels and pneumogastric nerve. Union of two heads conceals: middle scalenus, levator anguli scapulae, cervical plexus. Near in- sertion conceals: splenius, trachelo-mastoid, digastric, occipital artery, part of parotid. The deep cervical fascia is attached behind to the superior curved line of the occiput, to the ligamentum nuchas and to the spine of 7th cervical vertebra. It passes forwards enclosing the trapezius, and then over the posterior triangle as a single layer (where external jugular vein pierces it) until it reaches the posterior border of the sterno-mastoid, where it divides into two layers to enclose that muscle: in this area it is attached below to the clavicle At the anterior border of the sterno-mastoid the two layers again blend together (except for about one inch above the sternum), and passing forwards, over the anterior triangle, it blends with the fascia of opposite side in the middle line. Below where the two layers do not blend together, the anterior one is attached to the front of the upper part
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