Perforated form for Muscle Origin, Insertion, Action and Nerve

Experimental Demonstration of Tongue Muscle Origin in Chick Embryos

Development ◽

10.1242/dev.6.4.527 ◽

1958 ◽

Vol 6 (4) ◽

pp. 527-529

Author(s):

E. M. Deuchar

Keyword(s):

Chick Embryos ◽

Occipital Region ◽

Experimental Demonstration ◽

Tongue Muscle ◽

Segmental Nerve ◽

Reptile Species ◽

Tongue Muscles ◽

Mammalian Embryos ◽

Muscle Origin

Since in all classes of vertebrates the tongue muscles are innervated by nerve XII, a segmental nerve of the occipital region, it is usually argued on this criterion alone that they originate from occipital myotome tissue. Descriptive evidence in support of this generalization is, however, far from adequate. The most complete accounts that exist refer to one amphibian and two reptile species. In the amphibian Necturus, Platt (1897) observed that ventral outgrowths of the 3rd and 4th occipital myotomes became tongue muscles, and Edgeworth (1935) has described the development of tongue muscles in the reptiles Sphenodon and Lacerta, from ventral parts of two occipital and two cervical myotomes, all innervated by nerve XII. In avian and mammalian embryos, however, early muscle rudiments are extremely difficult to recognize with any certainty histologically.

Download Full-text

Leiomyosarcoma of the auricle: case report and literature review

The Journal of Laryngology & Otology ◽

10.1017/s0022215100140204 ◽

1998 ◽

Vol 112 (2) ◽

pp. 166-168 ◽

Cited By ~ 5

Author(s):

R. Murat Karasen ◽

Yavuz Sutbeyaz ◽

Cemal Gundogdu ◽

Bulent Aktan

Keyword(s):

Smooth Muscle ◽

Case Report ◽

Literature Review ◽

Head And Neck ◽

External Auditory Canal ◽

Neck Region ◽

Malignant Tumour ◽

Head And Neck Region ◽

Muscle Origin

AbstractLeiomyosarcoma is a malignant tumour of smooth muscle origin. These tumours are rarely encountered in the head and neck region. A case of leiomyosarcoma of the auricle is presented. There are two cases of external auditory canal leiomyosarcoma in the literature. To our knowledge the present case is the first example of leiomyosarcoma of the auricle.

Download Full-text