Biomedical subjects
Publications and source records attributed to J Jiménez Collado.
During routine bilateral dissection of 64 upper limbs in 32 adult human cadavers, four cases of an axillary arch, a muscular anomaly, were found. In one case, the axillary arch presented on both sides and in two cases it presented unilaterally on the right side. The innervation and relationships of the axillary arches are reported and the surgical significance of the anomaly is discussed.
The author effects a descriptive analysis of the different glandular thyroid stage, especially of side sketches, that taking as a basis our observations, we consider and demonstrate that they are originated only starting from the fourth bursae, because the parathyroids glands are ectodermic deriiated proceeding from the epicardic branchial placode, situated on the dorsal surfaces of the fourth epic blastic sulcus, both approaches opposite to classically accepted.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
The anterior tympanic artery, a branch of the maxillary artery, ascends through the retroarticular region dividing into anterior branches that spread through the posterior part of the temporomandibular joint, and posterior branches that contribute to the vascularization of the external acoustic meatus and the tympanic cavity. The arrangement of the anterior tympanic artery was studied bilaterally in 18 adult cadavers. In some cases, the anterior tympanic artery branches off from the superficial temporal artery. The relationships of the anterior tympanic artery with the posterior part of the temporomandibular joint were analyzed.
Explore the source record for details and available documents.
The arrangement of the pterygospinosus muscle was analyzed in 5 human fetuses. The pterygospinosus muscle extends from the posterior border of the lateral lamina of the pterygoid process to Meckel's cartilage. Such an arrangement would permit its action on the joint formed by Meckel's cartilage and the incus of the middle ear. The pterygospinosus muscle is a remnant of the masticatory muscle group. The relationships of the pterygospinosus muscle with the mandibular nerve and its branches and the maxillary artery and its branches were analyzed.
Explore the source record for details and available documents.
A study was conducted, on 30 human fetuses, of the structures passing through the tympanosquamosal fissure. The tympanosquamosal fissure lies between the middle ear and the temporomandibular region. Meckel's cartilage passes through the tympanosquamosal fissure and continues on into the middle ear with the cartilaginous anlage of the malleus. A tract of fibrous tissue arises from the mesenchyme, located cranial and lateral to Meckel's cartilage, that enters from the posterior area of the temporomandibular joint disc to the middle ear through the tympanosquamosal fissure, and attaches onto the area of continuity of Meckel's cartilage with the malleus. Transformation of Meckel's cartilage into the sphenomandibular ligament and anterior ligament of the malleus determines their continuity through the tympanosquamosal fissure. The posterior fibers of the temporomandibular joint disc giving rise to the discomalleolar ligament insert into the anterior ligament of the malleus.
The development and arrangement of the sphenomandibular ligament of 60 human embryos and fetuses were studied. Meckel's cartilage appeared as a single, continuous fibrous structure lying between the mandibular lingula and the malleus of the middle ear in fetuses of 210 mm crown-rump length (22 weeks of age) and over. This structure constitutes the malleolomandibular ligament, and two clearly differentiated portions bound by the tympanosquamosal fissure could be seen: a juxtaarticular portion, inserted on the posterior edge of the interpterygoid aponeurosis, and a tympanic portion, onto which the disc of the temporomandibular joint inserted. Some of the authors consider that if tension is applied to the sphenomandibular ligament this may injure the middle ear. The anatomical arrangement of the sphenomandibular ligament could explain these injuries.
The anterior process of the malleus of the middle ear develops irrespective of Meckel's cartilage through an intramembranous ossification center that appears in the human embryo of 26.5 mm crown-rump length at a caudomedial position in relation to Meckel's cartilage. The malleus has a double origin: the anterior process originates from the os goniale through intramembranous ossification, and the rest from Meckel's cartilage, through endochondral ossification.
The arrangement and relationships of the orbital muscle of Müller in human fetuses have been analyzed. This is a constant muscle made of smooth muscle fibers arranged over the longer axis of the inferior orbital fissure; some of its fibers reach the inferior wall of the cavernous sinus. The muscle layer is pierced by orbital rami of the medial maxillary artery and by thin veins communicating with the ophthalmic vein system and pterygoid plexus. The zygomatic nerve can be found in the midst of the muscle mass along most of its course. It is innervated by short rami from the sphenopalatine ganglion.
Explore the source record for details and available documents.