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Biomedical subjects

R Brunner

Publications and source records attributed to R Brunner.

At least 127 records · Page 7Linked to original sources
PubMed1983

Spectral analysis of tremorine and cold tremor electromyograms in animal species of different size.

In 14 mice (36.2 +/- 5.4 g), 17 rats (425 +/- 46.4 g), and 11 rabbits (3,200 +/- 340 g) a comparative electromyographic analysis of tremorine tremor and cold tremor was performed in gastrocnemius and tibialis anterior muscles using spectral analysis. The mean frequency of cold tremor decreased with increasing body weight (mice: 40.2 +/- 4.5 Hz; rats: 31.3 +/- 4.9 Hz; rabbits: 16.4 +/- 3.2 Hz). With tremorine tremor no such allometric correlation was found for tremor frequency and body weight (mice: 17.7 +/- 3.6 Hz; rats: 19.6 +/- 5.1 Hz; rabbits: 15.9 +/- 2.1 Hz). Cross spectral analysis revealed that during cold tremor the flexor muscle (tibialis anterior) and the extensor muscle (gastrocnemius) of rabbits are activated alternately. The mean phase shift between the activation of flexor and extensor muscle was -155.5 degrees. Stronger activation was observed in the flexor muscle. Tremorine tremor was characterized by synchronous activation of flexor and extensor muscles with a mean phase angle of 3.0 degrees and a predominance of the extensor muscle. The results suggest that the nervous mechanisms for the generation of tremorine tremor and cold tremor are different.

Animals↗
PubMed1983

Penile corporoplasty with polytetrafluoroethylene (PTFE) grafts.

Ten male dogs underwent segmental excision of tunica albuginea of corpus cavernosum penis and replacement with polytetrafluoroethylene grafts. None of the dogs exhibited acute or chronic adverse reaction to the graft. These findings suggest that PTFE may have a role in human reconstructive phalloplasty.

Animals↗
PubMed1980

Localization and neurophysiological properties of motoneurones of the M. triceps surae of the rat after retrograde labelling with Evans blue.

Evans blue was injected into either the medial and lateral gastrocnemius or the soleus muscle of adult albino rats to mark retrogradely the corresponding motoneurones in the spinal cord. The labelled motoneurones were identified by the red fluorescence of their perikarya in the ventral horn of segments L4--L6. In addition, a monosynaptic reflex action potential was recorded only in the ventral roots L4--L6 after stimulation of the nerves to the medial and lateral gastrocnemius and the soleus muscle. Excitability and reflex latencies of labelled and unlabelled motoneurones of segment L4--L6 as well as the conduction velocities of their axons were measured. Apart from a small but statistically nonsignificant increase in excitability, no functional differences were found between labelled and control neurones. Thus, retrograde labelling of motoneurones with Evans blue prior to performing electrophysiological experiments has the advantage that the marked motoneurones can be identified under the fluorescence microscope without the need of additional staining or fixation.

Action Potentials↗
PubMed1976

[Cytokinetics of epidermal and dermal cells in allergic contact dermatitis and atopic dermatitis (author's transl)].

The cytokinetics of epidermal and dermal cells was examined in 16 patients with subacute or chronic allergic contact dermatitis and 11 with atopic dermatitis. In allergic contact dermatitis a H3-thymidine-labelling index (H3-1) of 4.55 +/- 2.4% was found in the epidermis and of 0.7 +/- 0.44% in the dermal infiltrate. In comparsion, in atopic dermatitis the values were 5.5 +/- 2.31% in the epidermis and 0.93 +/- 0.72% in the dermis. The DNA-synthesis-time (ts) was lengthened slightly with 11.4 +/- 2.4 h in allergic contact dermatitis and 11.75 +/- 3.68 h in atopic dermatitis. In comparsion with normal skin, the cell-cycle-time (tc) was slightly shortened in allergic contact dermatitis (244 +/- 110 h) and in atopic dermatitis (233 +/- 83 h). There was no significant difference between both types of dermatitis regarding cytokinetics.

Cell Division↗
PubMed1976

Immunological follow-up of acute lymphoblastic leukaemia.

In different treatment groups of children with acute lymphatic leukaemia and undifferentiated leukaemia, the lymphocyte count and a number of immunologic parameters were examined during the various stages of treatment. These parameters were related to the type of chemotherapy as well as the stages of treatment. This paper deals with the values of lymphocyte counts, of gamma globulin, IgG, IgM and IgA and the results of the DNCB skin tests, as a parameter for cellular immunity. IgG determined by acetate sheet electrophoresis showed no significnat change, while its significant reduction was shown during the periods of prophylactic reinduction with vincristine in the Pinkel VII scheme, The IgM level was significantly raised in the initial stage before treatment and in all periods of treatment both in the Pinkel VII group and in an earlier therapeutic group treated with methotrexate every two weeks and vincristine pulses every six weeks. IgA was raised in both groups before treatment but significantly reduced during the phases of maintenance and reinduction. About 50% of the P VII cases had negative DNCB skin tests during maintenance therapy, while all long-term survivors in the earlier methotrexate group had a positive skin test.

Antibody Formation↗
PubMed1975

[Immunologic parameters in acute lymphatic leukemias in the course of different types of chemotherapy (author's transl)].

In 2 groups of patients under treatment with acute lymphatic leukemia and undifferentiated leukemia, apart from the lymphocyte count, a number of immunologic parameters were examined during the various stages of treatment. These parameters were related to the type of chemotherapy as well as the stages of treatment. This paper deals with the values of lymphocyte counts, of gammaglobulin, IgG, IgM and IgA and the results of the DNCB skin-tests, as a parameter for cellular immunity. The determination of gammaglobulin using the acetate sheet electrophoreses, showed no significant change. However a significant reduction of the IgG was shown during the periods of prophylactic reinduction with Vincristin in the Pinkel VII scheme. IgM quantities were significantly raised in the initial stage before treatment and in all periodes of treatment both in the Pinkel VII group and in an earlier therapeutic group with methotrexate two weekly and Vincristin pulses every 6 weeks. IgA was raised in both groups before treatment but significantly reduced during maintenance and reinduction phases. About 50% of the P VII cases had negative DNCB skintests during maintenance therapy, while all long term survivors in the earlier methotrexate treatment group had positive skintests. The 2 following papers deal with the results of PHA stimulation and the B and T cell determinations.

Child↗