ABNORMAL MUSCLES 



By J. BLAND SUTTON, F.R.C.S. 



ASSISTANT SURGEON TO THE MIDDLESEX HOSPITAL, AND SURGEON TO THE CHELSEA HOSPITAL FOR WOMEN 



Revised and Added to by ARTHUR ROBINSON, M.D., Lectueer ox Anatomy at the 



Middlesex Hospital 



The abductor ossis metatarsi quinti art'ses from the outer tubercle of the calcaneum. 



It is inserted into the tuberosity at the base of the fifth metatarsal bone. The origin and 

 insertion are marked in fig. 167. It is present in two out of every three subjects, and when not 

 represented by muscle fibres its place is occupied by a band of fibrous tissue. 



Agitator caudae is a small slip of muscles which arises from the last piece of the sacrum or 

 from the side of the coccyx. It is inserted into the femur below the gluteus maximus. 



Amygdalo-glossus. — A small muscle which arises from the side of the tongue and is inserted 

 into the outer surface of the tonsil. 



The anomalus arises from the nasal process of the maxilla, beneath the levator lahii superior is 

 akeqne nasi.' It is inserted into the maxilla close to the origin of the compressor nan's. 



The atlanto-mastoid arises from the transverse process of the atlas, between the superior 

 oblique and the rectus capitis lateralis. It is inserted into the posterior part of the mastoid 

 process. 



Azygos pharyngis. — This muscle arises from the pharyngeal tubercle on the under surface 

 of the body of the occipital bone. 



It is inserted into the raphe of the pharynx supei^ficial to the insertion of the superior and 

 middle constrictor muscles. It may blend with the ascending fibres of the middle constrictor. It 

 is often represented by a fibrous band. [For figure, see Macalister, Proc. Royal Irish Academy, 

 vol. ix. ] 



The chondro-epitrochlearis arises from the cartilages of one or two ribs (usually the seventh), 

 or from the aponeurosis of the external oblique muscle. 



It is inserted into the fascia on the inner side of the aiiu, or into the intermuscular septum, 

 and sometimes into the internal condyle of the humerus. [For figure, see Perrin, Journ. of 

 Anat. and Pliys. vol. v. plate ix.] 



The cleido-hyoid arises from the clavicle near the outer border of the sterno-hj'oid. 



It is inserted into the body of the hyoid superficial to the sterno-hyoid. 



The cleido-occipitalis arises from the clavicle posterior to the sterno-mastoid and anterior 

 or external to the cleido-mastoid. It runs upwards parallel with the posterior border of the 

 sterno-mastoid to be inserted into the su]ierior nuchal line of the occipital bone anterior to the 

 origin of the trapezius. [Perrin ; a good figure in Journ. of Anat. and Pliys. vol. v. p. 253.] 



The costo-coracoideus arises from one or more ribs, between the pectoralis major and the 

 latissimus dorsi, and is inserted into the coracoid ]irocess. 



The costo-fascialis is a muscular slip given off from the outer border of the sterno-thyroid 

 near its origin. 



It is in.<serted into the sheath of the carotid vessels, and sometimes reaches as high as the level 

 of the thyroid curtilage. 



The curvator coccygis arises from the anterior surface of the fifth piece of the sacrum. 



It is inserted into tlie anterior surface of the coccyx. [For figure, see M. Watson, Journ. 

 of Anat. and PJiys. vol. xiv. p. 407.] 



The depressor thyroideae arises from the lower border of the first ring of the trachea quite 

 clo.se to the middle lini'. 



It passes vertically upwards to be inserted into the lower border of the thyroid cartilage inter- 

 nal to the crico-thyroid. [The muscle is figured by Messeneer Bradlov in Joirrn. of Anat. and 

 P/iys. vol. vi. p. 420.] 



The dorso-epitrochlearis is a muscular slip given off by the tendon of the latissimus dorsi at 

 the axilla. Sometimes it is directly continuous with a chondro-epitroeldearis muscle. 



It is inserted into the long head of the triceps, or into the fascia of the arm, and sometimes 

 into the internal interuuiscular sei)tum. [For figure, see Perrin, Journ. of Anat. and Phys. 

 vol. V. plate X.] 



The epitrochleo-anconeus is a small muscle arising from the back of the internal condyle of 

 the humerus, and passing over the ulnar nerve is inserted into the inner side of the olecranon. 



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