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Animals : An Open Access Journal From... Jan 2024has unique anatomical characteristics, and many of its vascular and digestive tract aspects have yet to be clearly understood. This lack of information makes clinical...
has unique anatomical characteristics, and many of its vascular and digestive tract aspects have yet to be clearly understood. This lack of information makes clinical diagnoses and surgical procedures difficult. The aim of this study was to evaluate the anatomical aspects of frozen and glycerinated corpses of using computed tomography (CT), emphasizing vascular and digestive contrast studies. Nine corpses that died during routine hospital were examined via CT in the supine position with scanning in the craniocaudal direction. In frozen cadavers, the contrast was injected into a cephalic vein after thawing and, subsequently, was administered orally. In addition to bone structures, CT allowed the identification of organs, soft tissues, and vascular structures in specimens. Visualization of soft tissues was better after contrast been administered intravenously and orally, even without active vascularization. Furthermore, the surfaces of the organs were highlighted by the glycerination method. With this technique, it was possible to describe part of the vascularization of the brachial, cervical, thoracic, and abdominal regions, in addition to highlighting the esophagus and part of the stomach. CT can be another tool for the evaluation of cadavers by anatomists or pathologists, contributing to the identification of anatomical structures.
PubMed: 38337999
DOI: 10.3390/ani14030355 -
Morphologie : Bulletin de L'Association... Jun 2024Tensor fasciae suralis (TFS) is an accessory muscle of the posterior lower extremity. Although TFS has been documented in cadaveric and radiological reports, its... (Review)
Review
Tensor fasciae suralis (TFS) is an accessory muscle of the posterior lower extremity. Although TFS has been documented in cadaveric and radiological reports, its prevalence remains unknown. The TFS variant is noteworthy to anatomists, as it may be encountered in the dissection laboratory, and clinicians, as the muscle could potentially cause confusion during physical examination or diagnostic imaging. Multiple variations of TFS have been reported in the literature, suggesting the need for a classification system. We dissected 236 formalin-fixed cadaveric lower limbs to determine the prevalence of TFS. The PubMed and MEDLINE databases were searched to compare the anatomical features of independent TFS case reports. In our prevalence study, the TFS muscle was identified in three lower limbs (1.3%). In total, 38 cases of TFS (32 cadaveric and six radiological) were identified in the literature. Our literature review revealed that the accessory muscle most often arises as a single head from the long head of the biceps femoris, yet many other presentations have been documented. The need for a classification system to distinguish between the subtypes of TFS became apparent during the literature review. Tensor fasciae suralis is a rare muscle, present in only 3 of 236 (1.3%) cadaveric lower limbs dissected in this study. We propose the use of a classification system, based on muscle origin and number of heads, to better organize the subtypes of TFS.
Topics: Humans; Cadaver; Male; Female; Prevalence; Muscle, Skeletal; Aged; Anatomic Variation; Lower Extremity; Aged, 80 and over; Middle Aged
PubMed: 38325018
DOI: 10.1016/j.morpho.2024.100762 -
BioRxiv : the Preprint Server For... Jan 2024One of the important yet labor intensive tasks in neuroanatomy is the identification of select populations of cells. Current high-throughput techniques enable marking...
One of the important yet labor intensive tasks in neuroanatomy is the identification of select populations of cells. Current high-throughput techniques enable marking cells with histochemical fluorescent molecules as well as through the genetic expression of fluorescent proteins. Modern scanning microscopes allow high resolution multi-channel imaging of the mechanically or optically sectioned brain with thousands of marked cells per square millimeter. Manual identification of all marked cells is prohibitively time consuming. At the same time, simple segmentation algorithms suffer from high error rates and sensitivity to variation in fluorescent intensity and spatial distribution. We present a methodology that combines human judgement and machine learning that serves to significantly reduce the labor of the anatomist while improving the consistency of the annotation. As a demonstration, we analyzed murine brains with marked premotor neurons in the brainstem. We compared the error rate of our method to the disagreement rate among human anatomists. This comparison shows that our method can reduce the time to annotate by as much as ten-fold without significantly increasing the rate of errors. We show that our method achieves significant reduction in labor while achieving an accuracy that is similar to the level of agreement between different anatomists.
PubMed: 38293051
DOI: 10.1101/2023.09.13.557658 -
Annals of Anatomy = Anatomischer... Apr 2024Berlin anatomist Wilhelm von Waldeyer-Hartz (1836-1921) donated his skull, brain, and hands to his institute. Only the skull survives in the present-day collection. This...
INTRODUCTION
Berlin anatomist Wilhelm von Waldeyer-Hartz (1836-1921) donated his skull, brain, and hands to his institute. Only the skull survives in the present-day collection. This study investigates the skull itself as much as the historical context of Waldeyer's donation.
METHODS
Physical-anthropological investigation of the remains and historical research.
RESULTS
Waldeyer's main motivation was the donation of his brain to science. While this was the first ever recorded body donation in Berlin, it was not unusual for scientists of his time to donate their brains and/or to investigate brains of fellow scientists to correlate brain morphology to individual traits. Nevertheless, Waldeyer's pupil Hans Virchow expressed reservations dissecting his former boss, reservations that were unknown to him when dissecting others. Waldeyer's brain was never investigated and not preserved, likely due to damage by stroke and poor anatomical fixation. Waldeyer's skull shows the common features of a male European of senile age with some notable anatomical variation including a "trigeminus bridge".
DISCUSSION
Waldeyer's donation is embedded in a tradition of research looking, if in vain, for traceable signs of intelligence or geniality in brains of well-known individuals. Reservations of anatomists to dissect other anatomists and to donate their own bodies persist until today.
Topics: Humans; Male; Anatomists; Tissue Donors; Brain; Skull; Head
PubMed: 38278306
DOI: 10.1016/j.aanat.2024.152209 -
The Western Journal of Emergency... Jan 2024Despite the inclusion of both diagnostic and procedural ultrasound and regional nerve blocks in the original Model of the Clinical Practice of Emergency Medicine (EM),...
INTRODUCTION
Despite the inclusion of both diagnostic and procedural ultrasound and regional nerve blocks in the original Model of the Clinical Practice of Emergency Medicine (EM), there is no recommended standardized approach to the incorporation of ultrasound-guided regional anesthesia (UGRA) education in EM training.
METHODS
We developed and implemented a structured curriculum for both EM residents and faculty to learn UGRA in a four-hour workshop. Each Regional Anesthesia Anatomy and Ultrasound Workshop was four hours in length and followed the same format. Focusing on common UGRA blocks, each workshop began with an anatomist-led cadaveric review of the relevant neuromusculoskeletal anatomy followed by a hands-on ultrasound scanning practice for the blocks led by an ultrasound fellowship-trained EM faculty member, fellow, or a postgraduate year (PGY)-4 resident who had previously participated in the workshop. Learners identified the relevant anatomy on point-of-care ultrasound and reviewed how to conduct the blocks. Learners were invited to complete an evaluation of the workshop with Likert-scale and open-ended questions.
RESULTS
In the 2020 academic year, six regional anesthesia anatomy and ultrasound workshops occurred for EM faculty (two sessions, N = 24) and EM residents (four sessions, N = 40, including a total of five PGY4s, 10 PGY3s, 12 PGY2s, and 13 PGY1s). Workshops were universally well-received by both faculty and residents. Survey results found that 100.0% of all responding participants indicated that they were "very satisfied" with the session. All were likely to recommend this session to a colleague and 95.08% of participants believed the session should become a required component of the EM curriculum.
CONCLUSION
The use of UGRA is increasing, and and it critical in EM. An interdisciplinary approach in collaboration with anatomists on an interactive, nerve block workshop incorporating both gross anatomy review and hands-on scanning was shown to be well-received and desired by both EM faculty and residents.
Topics: Humans; Curriculum; Anesthesia, Conduction; Nerve Block; Emergency Medicine; Ultrasonography, Interventional
PubMed: 38205993
DOI: 10.5811/westjem.59793 -
Medeniyet Medical Journal Dec 2023The coeliac trunk, the first anterior branch, often originates at the level of the T12 vertebral body, right below the aortic hiatus, as the first ventral branch of the...
The coeliac trunk, the first anterior branch, often originates at the level of the T12 vertebral body, right below the aortic hiatus, as the first ventral branch of the abdominal aorta. It commonly divides into the left gastric, common hepatic, and splenic arteries. We report a rare variation in the branching pattern and course of branches of the coeliac trunk in two donated female cadavers during routine abdominal dissection. It is essential to understand the coeliac trunk and the distinctions in its origin and branching pattern to perform efficient upper abdominal surgical and radiological procedures and to adopt novel interventional and treatment options for hepatic cancers. As anatomists, we are also attempting to link our study's variations to their embryological genesis.
PubMed: 38148727
DOI: 10.4274/MMJ.galenos.2023.63993