Roger Mayeda Clemmons, DVM, Ph.D.

Associate Professor of Neurology & Neurosurgery

  

Curriculum Vitae:

Education:

  • Doctor of Veterinary Medicine - Washington State University , 1973
  • Doctor of Philosophy - Washington State University, 1979

    Honors and Awards:

  • Phi Kappa Phi
  • Bausch and Lomb Honorary Science Award
  • Phi Zeta
  • NRSA Post Doctoral Fellowship, 1977-1978
  • Scottish Terrier Clubs of American Research Award Winner, 1981
  • Tenured Faculty Member, 1985
  • Who's Who in Veterinary Science and Medicine, 1987
  • Sabbatical Granted, 1988
  • Superior Accomplishment Award, University of Florida,1992
  • SCAVMA Certificate of Teach Excellence in the Clinical Sciences (HM)  1995
  • Merck Ag-Vet Award for Creativity in Teaching, 1997
  • American Men and Women of Science, 1997

    Clinical and Research Interests:

    Selected Publications:

    Books, Contributor of Chapter(s):

    1. Clemmons RM:  Subtraction radiology.  In:  JW Ticer (ed), Radiographic Technique in Small Animal Practice, Philadelphia, WB Saunders, Chapter 15, 422-428, 1975.

    2. Clemmons RM:  Surgical corrections of hydrocephalus by ventriculoperitoneal shunts.  In:  MJ Bojrab (ed), Current Techniques in Small Animal Surgery II, Philadelphia, Lea & Febiger, pp. 18-20, 1982.

    3. Meyers KM, Clemmons RM:  Scotty cramp.  In:  RW Kirk (ed), Current Veterinary Therapy VIII, Philadelphia, WB Saunders, pp. 702-704, 1982.

    4. Clemmons RM:  Degenerative myelopathy.  In:  RW Kirk (ed), Current Veterinary Therapy X, Philadelphia, WB Saunders, pp. 830-833, 1989.

    5. Clemmons RM:  Approach to hemostatic problems.  In:  AM Koterba, WH Drummond, PC Kosch (eds), Equine Clinical Neonatology, Philadelphia, Lea & Febiger, pp. 615-622, 1990.

    6. Clemmons RM:  Degenerative myelopathy.  In:  MJ Bojrab (ed), Disease Mechanisms in Small Animal Surgery, Philadelphia, Lea & Febiger, pp. 984-986, 1993.

    7. Chrisman CL, Clemmons RM:  Electrodiagnostic testing. In:  MJ Bojrab (ed).  Disease Mechanisms in Small Animal Surgery, Philadelphia, Lea & Febiger, pp. 1183-1201, 1993.

    Refereed Publications:

    1. Clemmons RM:  Subtraction Radiology.  J Am Vet Rad Soc, 17:67-76, 1976.

    2. Baber KA, Meyers KM, Clemmons RM, Peters RI:  Regional concentrations of serotonin, tryptophan, 5-hydroxyindoleacetic acid, dopamine and norepinephrine in ovine brain.  Am J Vet Res, 40:1378-1380, 1979.

    3. Baber KA, Meyers KM, Clemmons RM, Peters RI:  Effects of tryptophan loading on the metabolism of serotonin in the central nervous system of the sheep.  Am J Vet Res, 40:1381-1385, 1979.

    4. Edmonds HL, Hegreberg GA, VanGelder NM, Sylvester DM, Clemmons RM, Chatburn CC:  Spontaneous convulsions in beagle dogs.  Fed Proc, 38:2424-2427, 1979.

    5. Waxman FJ, Clemmons RM, Johnson G, Everman JF, Johnson MI, Roberts C, Hinrichs DJ:  Progressive myelopathy in older German shepherd dogs: I. Depressed response to thymus-dependent mitogens.  J Immunol, 124:1209-1215, 1980.

    6. Waxman FJ, Clemmons RM, Hinrichs DJ:  Progressive myelopathy in older German shepherd dogs: II. Presence of circulating suppressor cells.  J Immunol, 124:1216-1222, 1980.

    7. Clemmons RM, Peters RI, Meyers KM:  Scotty cramp: a review of cause, characteristics, diagnosis and treatment.  Compend Cont Educ Sm An Pract, 2:385-388, 1980.

    8. Long GG, Clemmons RM, Heath H:  Metastatic canine medullary thyroid carcinoma:  a case report.  Vet Pathol, 17:323-330, 1980.

    9. Meyers KM, Katz JB, Clemmons RM, Smith JB, Holmsen H:  An evaluation of the arachidonate pathway of platelets from companion and food-producing animals, mink, and man.  Thromb Res, 20:13-24, 1980.

    10. Raphael BL, Clemmons RM, Hai TN:  Glioblastoma multiforme in a budgerigar.  J Am Vet Med Assoc, 177:923-925, 1980.

    11. VanGelder NM, Edmonds HL, Hegreberg GA, Chatburn CC, Clemmons RM, Sylvester DM:  Amino acid changes in a genetic strain of epileptic beagle dogs.  J Neurochem, 35:1087-1091, 1980.

    12. Meyers KM, Huston LY, Clemmons RM:  Regulation of canine platelet function: II.  Catecholamines.  Am J Physiol, 245:R100-R108, 1983.

    13. Clemmons RM, Bliss EL, Dorsey-Lee MR, Seachord CL, Meyers KM:  Platelet function, size and yield in whole blood and in platelet-rich plasma prepared using differing centrifugation force and time in domestic and food-producing animals.  Thromb Haemostas, 50:838-849, 1983.

    14. Clemmons RM, Gorman NT, Calderwood-Mays MB:  A lumbar epidural chondrosarcoma in a Doberman Pinscher,  J Am Vet Med Assoc, 183:1006-1007, 1983.

    15. Clemmons RM, Meyers KM:  Acquisition and aggregation of canine blood platelets: basic mechanisms of function and differences because of breed origin.  Am J Vet Res, 45:137-144, 1984.

    16. Sundlof SF, Clemmons RM, Meyer DJ, Rappaport JJ, Fossler ME, Hubbell J:  Cholinesterase activity in plasma, red blood cells, muscle, and brain of dogs following repeated exposure to spotton (fenthion).  Vet Human Toxicol, 26:112-117, 1984.

    17. Clemmons RM, Meyer DJ, Sundlof SF, Rappaport JJ, Fossler ME, Hubbell J, Dorsey-Lee MR:  Correction of organophosphate-induced neuromuscular blockade by diphenhydramine.  Am J Vet Res, 45:2167-2169, 1984.

    18. Clemmons RM, Dorsey-Lee MR, Gorman NT, Sturtevant FC:  Hemostatic mechanisms of the newborn foal: reduced platelet responsiveness.  Equine Vet J, 16:353-356, 1984.

    19. Clemmons RM, Dorsey-Lee MR, Gorman NT, Meyer DJ:  Comparison of coagglutinin-induced platelet agglutination of fresh and fixed canine platelets.  Thromb Res, 36:271-276, 1984.

    20. Clemmons RM, Collins BR, Dorsey-Lee MR:  Pregnancy induces increased platelet responsiveness in the non-human primate.  Thromb Res, 36:73-77, 1984.

    21. Kollias GV, Clemmons RM, Stetzer ER, Walsh MT, Beusse DO:  Polyradiculoneuritis in a California sea lion.  J Am Vet Med Assoc, 185:1410-1412, 1984.

    22. Clemmons RM, Dorsey-Lee MR, Bliss EL, Asbury AR, Cook D, Brown V:  Failure of superoxide dismutase to alter equine arachidonic acid-induced platelet aggregation, in vitro or ex vivo.  Am J Vet Res, 46:1104-1106, 1985.

    23. Waldbillig RJ, Wieder GE, Clemmons RM, Barness TJ:  Rostral hypothalamic microinfusions of 5,7-dihydroxytryptamine produced anatomically and neurochemically selective depletions of hippocampal serotonin and increase the influence of estrogens and food deprivation on locomotor activity.  Brain Res, 347:149-153, 1985.

    24. Clemmons RM, Armstrong D, Dorsey-Lee MR:  Arachidonic acid-induced platelet aggregation and malondialdehyde production in dogs of various ages and in dogs affected with canine ceroid lipofuscinosis.  Age, 9:15-19, 1986.

    25. Clemmons RM, Yamaguchi RA, Schaub RG, Dorsey-Lee MR, Fleming J, McDonald TL:  The interaction between canine platelets and adults heartworms: platelet recognition of heartworm surfaces.  Am J Vet Res, 47:322-325, 1986.

    26. Cooley AJ, Clemmons RM, Gross TL: Heartworm disease menifested by encephalomyelitis and myositis in a dog.  J. Am. Vet. Med. Assoc. 190:431-432, 1987.

    27. Heard DJ, Jacobson ER, Clemmons RM, Campbell GA:  Bacteremia and septic arthritis in a West African dwarf crocodile.  J Am Vet Med Assoc, 192:1453-1455, 1988.

    28. Reed SM, Hegreberg, GA, Bayly WA, Brown CM, Paredis MR, Clemmons RM:  Progressive myotonia in foals resembling human dystonia myotonia.  Muscle Nerve, 11:291-296, 1988.

    29. Bowen DJ, Clemmons RM, Meyer DJ, Dorsey-Lee MR:  Platelet functional abnormalities secondary to hepatocholestasis and elevation of serum bile acids.  Thromb Res, 52:649-654, 1988.

    30. Ellison GW, Seim HB, Clemmons RM: Distracted cervical spinal fusion for management of caudal cervical spondylomyelopathy in large-breed dogs. J. Am. Vet. Med. Assoc. 193:447-453, 1988.

    31. Herbst LH, Webb AI, Clemmons RM, Dorsey-Lee MR, Storrs EE:  Plasma and erythrocyte cholinesterase values for the common long-nose armadillo, Dasypus novemcinctus.  J Wildlife Dis, 25:364-369, 1989.

    32. Little R, Bailey D, Brewster ME, Estes KS, Clemmons RM, Saab A, Bodor N:  Improved delivery through biological membranes:  XXXIII.  Brain-enhanced delivery of azidothymidine (AZT).  J Biopharm Sci, 1:001-018, 1990.

    33. Clemmons RM: How Do I Treat? Acute and subacute organophosphate intoxication in the dog and cat. Prog Vet Neurol, 1:102-103, 1990.

    34. Dietzel K, Keuth V, Estes KS, Brewster ME, Clemmons RM, Vistelle R, Bodor NS, Derendorf H:  A redox-based system that enhances delivery of estradiol to the brain:  Pharmacokinetic evaluation in the dog. Pharm Res, 7:879-883, 1990.

    35. Wu WH, Pop E, Shek E, Clemmons R, Bodor N:  Brain and CSF chemical delivery systems for ß-lactam antibiotics.  Study of two dihydropyridine derivatives of benzylpenicillin in rabbits and dogs. Drug Design Delivery, 7:33-43, 1990.

    36. Beale, KM, Altman, D, Clemmons, RM, Bolon, B:  Systemic toxicosis associated with azathioprine administration in domestic cats.  Am J Vet Res, 53:1236-1240, 1992.

    37. Clemmons RM: Degenerative myelopathy.  Vet Clin N Am, 22:965-971, 1992.

    38. Clemmons RM, Meyer DJ, Dorsey-Lee MR, Maxwell A:  Reduced neonatal platelet function and serum bile acids.  Thromb Res, in press.

    39. Beale BS, Clemmons RM, Goring RL, Shelton SG, Altman D: The effects of a semi-synthetic polysulfated gylcosaminoglycan on the hemostatic mechanisms in the dog. Thromb Res, in press.

    40. de Hann JJ, Beale BS, Clemmons RM, Clark L:  The effects of polysulfated glycosaminoglycan (Adequan) on activated partial thromboplastin time, prothrombin time, complete blood count, biochemical profile and urinalysis in cats.  VCOT 7:77-81, 1994.

    41. Clemmons RM, Wheeler S, LeCouteur RA: How Do I Treat?  Degenerative Myelopathy. Prog Vet Neruol, 6:71-72, 1995.

    42. Platt SR, Sheppard BJ, Graham J, Uhl E, Meeks J, Clemmons RM: Pheochromocytoma in the vertebral canal of two dogs. J Am Anin Hosp Aso, in press.

    43. Walker-MC; Platt-SR; Graham-JP; Clemmons-RM: Vertebral physitis with epiphyseal sequestration and a portosystemic shunt in a Pekingese dog. J Small Anim Pract, 40(11): 525-8, 1999.

    44. Platt-SR; Graham-J; Chrisman-CL; Adjiri-Awere-A; Clemmons-RM: Canine intracranial epidermoid cyst. Vet Radiol Ultrasound, 40(5): 454-8, 1999.

    45. Platt-SR; Chrisman-CL; Graham-J; Clemmons-RM: Secondary hypoadrenocorticism associated with craniocerebral trauma in a dog. J Am Anim Hosp Aso, 35(2): 117-22, 1999.

    46. Mariani CL, Clemmons RM, Graham JP, Phillips LA, Chrisman CL. Magnetic resonance imaging of spongy degeneration of the central nervous system in a Labrador Retriever. Accepted for publication in Vet Radiol Ultrasound.

    47. Mariani CL, Platt SR, Newel SM, Terrell SP, Chrisman CL, Clemmons RM. Magnetic resonance imaging of cerebral cortical necrosis (polioencephalomalacia) in a dog. Accepted for publication in Vet Radiol Ultrasound.

    48. Mariani CL, Platt SR, Scase TJ, Howerth EW, Chrisman CL, Clemmons RM. Cerebral phaeohyphomycosis caused by Cladosporium sp. in two domestic cats. Accepted for publication in the J Am Anim Hosp Aso.

    49. Clemmons RM, Ramirez HE, Lee-Ambrose L, Martin GM. The putative epitopic sequence of the p-27 antigen of FeLV. Submitted to the Am J Vet Res.

    50. Clemmons RM, McDonald TL, Freeman KA, Lee-Ambrose L. Presence and composition of circulating immune complexes in German Shepherd dogs afflicted with degenerative myelopathy. Submitted to the Am J Vet Res.

    51. Clemmons RM, O'Sullivan CK, Lee-Ambrose L. Immunodetection of inflammatory markers in the cerebral spinal fluid of German Shepherd dogs afflicted with degenerative myelopathy. Submitted to Am J Vet Res.

    52. Clemmons RM, Lee-Ambrose L, Roberts GD. The effects of carprofen on canine platelet function. Submitted to Vet Surg.

    53. Clemmons RM. Enhanced protein binding to nitrocellulose membranes by glycerol pre-treatment. Submitted to Vet Immunol Immunopathol.

    54. Clemmons RM, Lee-Ambrose L. Effects of methyprednisolone and n-acetylcysteine on canine platelet function. Submitted to Vet Surg.