About

Tad Campbell is a Clinical Assistant Professor and the Associate Dietetic Internship Director in the Department of Nutrition at Texas A&M University. He is a member of the Texas A&M AgriLife organization, which includes the Texas A&M AgriLife Extension Service, Texas A&M AgriLife Research, and other related entities. His role involves overseeing dietetic internship programs and contributing to the department's educational and research missions. Further details about his specific research focus, background, or key contributions are not provided in the available page text.

Research topics

• Geography
• Physics
• Archaeology
• Acoustics
• Food science
• Demography
• Genetics
• Evolutionary biology
• Art
• Biology
• Chemistry
• Geology

Selected publications

• A unique right gonadal artery origin and course with embryological implications: case report

  Folia Morphologica · 2026-02-06

  articleOpen accessSenior author

  BACKGROUND: The gonadal arteries are highly variable vascular structures responsible for supplying blood to the testes and ovaries. Although a standard description of these vessels is typically given in medical texts, variations in number, origin, and course are well documented. Here, we review the literature, report an unusual origin and course of a right gonadal artery (RGA), and discuss these findings in the context of embryological hypotheses of RGA course in relation to inferior vena cava (IVC) development. CASE REPORT: During routine dissection of an 80-year-old female donor, the RGA was found to originate from the cranial aspect of the right renal artery posterior to the left renal vein. From this position it emerged inferior to the left renal vein and coursed anterior to the IVC where it began to course with the left gonadal vein. The left gonadal artery presented with the typical origin and course. CONCLUSIONS: To our knowledge, this case provides the third reported instance in the literature of an RGA originating at the level of or above the left renal vein and passing anterior to the IVC.

  PublisherOA PDFDOI

• Assessing the Impact of Dataset Bias in Understanding Small Mammal Communities: A Comparison of Trapping and Owl Pellet Data From the Koanaka Hills, Botswana

  Abstracts with programs - Geological Society of America · 2025-01-01

  article
  PublisherDOI

• A Blind Evaluation of Morphological Keying With Genetically Identified Southern African Rodents

  Abstracts with programs - Geological Society of America · 2025-01-01

  article
  PublisherDOI

• Anatomical variation in the external vasculature of the human heart: A cadaveric investigation of dominance in coronary artery branching and cardiac venous drainage

  Annals of Anatomy - Anatomischer Anzeiger · 2025-10-27

  article
  PublisherDOI

• Anatomical variation in the external vasculature of the human heart: A cadaveric investigation of dominance in coronary artery branching and cardiac venous drainage

  SSRN Electronic Journal · 2025-01-01

  preprintOpen access
  PublisherDOI

• Anatomical variants in the thyroid region and clinical implications for emergency airway procedures: A cadaveric case report

  Medical Reports · 2024-03-21

  articleOpen access

  Understanding the anatomy of the anterior neck is critical in invasive thyroid and airway procedures; however, there are a variety of possible deviations from textbook anatomy that may be present in this region. The thyroid ima artery is a variant supplying the thyroid gland that follows a medial course over the anterior trachea. Therefore, if not accounted for, it is a potential hemorrhage risk in emergency airway procedures and thyroid surgeries. Another anatomical variant in this region, a pyramidal lobe, is an extra thyroid lobe that typically extends superiorly from the isthmus and is attributable to incomplete involution of the thyroglossal duct during embryonic development. The pyramidal lobe can interfere with cricothyrotomy and can also make thyroid surgeries more difficult. For example, in complete thyroidectomies the presence of a pyramidal lobe could result in incomplete removal of the glandular tissue. To further document clinically relevant anatomical variation in this region, the present study examined 84 body donors for these two variations. Of these individuals, 14.3% had a thyroid ima artery, which is higher than previous estimates and suggests that this artery is at greater risk during thyrotomy than previously thought. Alternately, 20.2% of donors had a pyramidal lobe, which is a lower frequency than previous studies. Additionally, 6.0% of the sample exhibited both anatomical variants. Roughly three-quarters (71.4%) of the sample exhibited neither variant. This high occurrence of anatomical variation in the thyroid region suggests that caution is warranted during emergency airway procedures. The use of medical imaging prior to conducting a non-emergent procedure near the thyroid may reduce risks of iatrogenic damage.

  PublisherDOI

• Analysis of humeral septal apertures in forensic and archaeological samples

  Forensic Science International Reports · 2022 · 5 citations

  Senior authorCorresponding
  • Demography
  • Biology
  • Archaeology

  Septal apertures (SA) are defects in the bony septum that separates the olecranon and coronoid fossae. Previous research suggests the presence of SA are highly variable between populations and generally occur at higher frequencies in females and on left humeri. Here, we analyze specimens from two modern willed body forensic collections (n = 617) and three archaeological assemblages (n = 103). Where feasible, we test for differences between sexes, sides, aperture sizes, and age distributions within self-identified racial categories and in the complete assemblage. We also present a novel assessment of SA and handedness. In brief, significant sex-based differences were found in one archaeological sample, the combined forensic sample, and the white racial category. Significant side-based differences favoring the left were found in the combined forensic and male specific sample. Significant differences in SA sizes were identified when bilaterally expressed in the forensic mixed sex sample. A test for aperture presence and hand dominance found significant differences with the majority (71%) of unilateral apertures found on the non-dominant side. Aperture presence was strongly correlated (r > 0.97) with sample size and uncorrelated with age cohorts. While high (> 40%) population-based frequencies were found in the archaeological samples similar to previous studies, a high frequency (17.8%) was also found in the white racial category exceeding most values reported for populations of European ancestry. This study contributes to the understanding of SA by providing a novel analysis of their association with handedness and provides new data on their prevalence in both archaeological and modern forensic assemblages.

  PublisherDOI

• it’s raining in evanston

  The Prairie Light Review · 2020

  1st authorCorresponding
  • Food science
  • Chemistry
  PublisherOA PDF

• A Hunting Horn

  The Prairie Light Review · 2020

  1st authorCorresponding
  • Geology
  • Art
  • Archaeology
  Publisher

• Taxonomic and Ecological Functional Analysis of Modern and Fossil Southern African Rodent Postcrania

  OakTrust (Texas A&M University Libraries) · 2019-11-14

  articleOpen access1st authorCorresponding

  Rodent remains found in many southern African Plio-Pleistocene fossil-bearing deposits are commonly used to reconstruct paleoenvironments using a taxonomic framework. In these studies, craniodental remains are the primary material used to reconstruct rodent paleocommunities while postcranial elements are generally not considered. Utilizing several different methods, this study tests whether analyses of African rodent postcrania can provide useful data for reconstructing past environments. First, this study tests if postcranial remains recovered in modern owl pellets can be considered isotaphonomic with recovered craniodental elements. Second, using both traditional linear measurements and two-dimensional outlines from digital photographs, this study tests if modern rodent postcrania can be used to identify what taxa (i.e. subfamily, genus and species) are present, and thus can be used in a similar manner as craniodental remains to reconstruct rodent community composition. Third, traditional linear measurements are also used to test locomotor habits exhibited by modern rodents within an ecological functional framework. Results from these analyses are then applied to fossil specimens from the hominin-bearing site of Swartkrans, South Africa. Results from this study show that rodent postcrania are as representative, or better, of the number of individual rodent prey items taken in modern owl roosts compared to estimates based on craniodental remains. Additionally, this study finds significant statistical support for the presence of ecological functional signals, as well as taxonomic signals at the family, subfamily, and genus level using rodent postcranial remains.\nClassification rates, however, were generally low unless all postcranial elements included in this analysis were utilized. Rates for analyses of humeri and femora individually were not adequate for application to the fossil record with one exception. Outline based analyses of modern femoral form (i.e. shape + size) at the subfamily level classified correctly 90.1% of the time using linear discriminant function analysis with cross-validation. When these functions are applied to fossil rodent femora from Swartkrans two previously unidentified subfamilies, Cricetomyinae (pouched mice and rats) and Petromyscinae (rock mice), are recovered. The inferred habitat signal from the cricetomyines suggests a wooded component in Members 1 and 2, while that from petromyscines suggests a significant arid component in Members 1-3 during the period in which these deposits accumulated.

  Publisher

Frequent coauthors

• Patrick J. Lewis

  Sam Houston State University

  5 shared

• Justin K. Williams

  Children's Healthcare of Atlanta

  4 shared

• Darryl J. de Ruiter

  Texas A&M University

  4 shared

• Elen Feuerriegel

  3 shared

• Caroline VanSickle

  A.T. Still University

  3 shared

• Scott A. Williams

  United Nations Economic and Social Commission for Asia and the Pacific

  3 shared

• Christopher S. Walker

  North Carolina State University

  3 shared

• Tracy L. Kivell

  Max Planck Institute for Evolutionary Anthropology

  3 shared