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A Alvarez Arenal

Publications and source records attributed to A Alvarez Arenal.

At least 19 recordsLinked to original sources
PubMed1990

[Microscopic innervation of the skin and annexes of the labium oris].

It is studied the skin and annexes innervation of cat and Wistar rat lips with argentic impregnation and acetylcholinesterase technique. It is made evident the existence of a subepithelial plexus from where some nervous fibers leave ending in the epithelial deep stratums and nervous fibers that finish in dermis thickness forming complex ramifications and different type I and II of SETO morphotypes of nervous receptors. They aren't found typical Merckel, Meissner o Paccini mechano-receivers. The nervous terminations in the transition skin-mucous zone are like the ones found in the rest of skin epidermis. Some intraepithelial fibers have been described at level of sudoriferous and sebaceus glands and sensitive corpuscles in connexion with pilous follicles.

Acetylcholinesterase↗
PubMed1989

[Microscopic innervation of the spermatic ducts and the testis. III: Tubuli seminiferi recti, rete testis and ductuli efferentes testis].

The cholinesterase activity and ultrastructural characteristics of the nerves in tubuli seminiferi recti, rete testis and ductuli efferentes testis have been studied in Wistar rats. The tubuli seminiferi recti and rete testis are innervated by a dense network which has varicosities containing different types of synaptic vesicles. The nerve fibres are located between the smooth muscle cells and the fibroblasts, and under the epithelial basement membrane. Inside the ductuli efferentes testis, the nerves form perivascular, subepithelial and muscle plexuses. According to the positive reaction for cholinesterase as well as the characteristics of the synaptic vesicles, these structure have at least a double adrenergic-cholinergic innervation. Our results demonstrate that the nervous fibres in ductuli efferentes testis are more abundant than in tubuli seminiferi recti and rete testis. The role of the vegetative nervous system in the initial segments of the spermatic pathways is discussed.

Animals↗
PubMed1989

[Morphostructure of myoneural synapses of the lingual musculature].

The human and the rabbit tongue with different histologycal techniques are studied. Most muscle fibers of the tongue shown one or various motor end-plates derivated from a single axon. It is not frequent a polisynaptic innervation. The muscular polo of the synapse have few nyofibrils, nucleus and sarcoplasma without differentiation. Does not exit differences between the motor end-plates of the tongue from the man and the rabbit.

Animals↗
PubMedDate not supplied

[Evaluation of endodontic treatment with modified Walkhoff technique in teeth with necrotic pulp and/or periapical lesions].

A treatment has been carried out in a total of 112 dental cases with necrotic pulp and/or periapical lesions using yodoformic paste. The technique employed was that of a conventional endodontic therapy of the root and ductal filling, using yodoformic paste and gutta-percha. The clinical and radiological follow up checks, three, six and twelve months after treatment, show improvement in the periapical lesions, with bone regrowth and complete disappearance of the radio-lucity within a variable time span, depending on the gravity of the damage, but never greater than twelve months. The immediate post-operative well being and absence of complications in the majority of cases also be highlighted.

Camphor↗
PubMedDate not supplied

[Immediate denture].

Explore the source record for details and available documents.

Dental Impression Technique↗
PubMedDate not supplied

[Effects of met-enkephalin on the testis. III. Histoenzymatic study].

We studied the testis of Wistar rats weighing 280-300 gms. following the administration of a single, acute intracardiac dose of methionine-enkephalin (100 microliters of 50% met-enkephalin solution), or a chronic intramuscular dose (50 microliters of 40% met-enkephalin solution). Rats were sacrificed at 15, 30 and 60 minutes following acute injection. Those on chronic treatment were injected once daily for 10 or 20 days. For the study, we utilized 105 male Wistar rats; 30 comprised the control group, and 75 comprised the study group. The following staining methods were used: 1) succinate dehydrogenase, 2) lactate dehydrogenase, 3) ATPase, 4) acid phosphatase, 5) alkaline phosphatase. We observed marked histoenzymological changes in the rat testis. Particularly noteworthy was a marked change in the energy pathways consisting of a decreased activity of aerobic pathways (decreased SDH activity), increased anaerobic activity (increased LDH activity), and consequently, decreased cellular energy stores (decreased ATPase activity). Similarly, changes were observed in other nonspecific enzymes that led to a fall in acid phosphatase activity and a rise in alkaline phosphatase activity.

Acid Phosphatase↗
PubMedDate not supplied

[Microscopic innervation of the spermatic ducts and testis. II. Ductus epididymis].

The microscopic innervation of the ductus epididymis in the rat has been studied both in light and electron microscope. The nerve fibres form perivascular, intramuscular and subepithelial plexuses. Occasionally sensory formations were observed in the adventitia of the cauda epididymis. The innervation is more abundant in the cauda epididymis than in the other segments (caput and corpus). The varicosities and endings of nerve fibres have synaptic vesicles of different sizes and electron characteristics. Some of the varicosities were close to the muscle cells and without glial sheath. The epithelial cells were not directly innervated.

Animals↗