Wisconsin Discovery Portal

Researcher: Stephen Johnson

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Areas of Expertise
  • Role of GABAA receptor subunits in respiratory motor control
  • Respiratory rhythm generation and neuroplasticity in turtles
  • Reptile analgesia without respiratory depression
  • Cellular mechanisms underlying neuroplasticity in the spinal cord
  • In vitro brainstem/spinal cord preparations from young mice and turtles
  • How respiratory rhythm is generated and modulated in vertebrates
  • Models of long-lasting frequency plasticity
Web Site Stephen Johnson's School of Veterinary Medicine Website
Curriculum Vitae (CV)
Issued Patent(s)
  • 7,504,069 - Micro device for high resolution delivery and monitoring of stimuli to a biological object, in vitro, issued March 2009.
USPTO Published Applications
Recent Publication(s)
  • Daily isoflurane exposure increases barbiturate insensitivity in medullary respiratory and cortical neurons via expression of ε-subunit containing GABA ARs. Hengen KB, Nelson NR, Stang KM, Johnson SM, Smith SM, Watters JJ, Mitchell GS, Behan M. PLoS One. 2015 Mar 6;10(3):e0119351. doi: 10.1371/journal.pone.0119351. eCollection 2015.

  • Abrupt changes in pentobarbital sensitivity in preBötzinger complex region, hypoglossal motor nucleus, nucleus tractus solitarius, and cortex during rat transitional period (P10-P15). Turner SM, Johnson SM. Respir Physiol Neurobiol. 2015 Feb 1;207:61-71. doi: 10.1016/j.resp.2014.12.016. Epub 2014 Dec 27.

  • Hypoxia switches episodic breathing to singlet breathing in red-eared slider turtles (Trachemys scripta) via a tropisetron-sensitive mechanism. Johnson SM, Krisp AR, Bartman ME. Respir Physiol Neurobiol. 2015 Feb 1;207:48-57. doi: 10.1016/j.resp.2014.12.015. Epub 2014 Dec 24.

  • Respiratory neuron characterization reveals intrinsic bursting properties in isolated adult turtle brainstems (Trachemys scripta). Johnson SM, Hedrick MS, Krause BM, Nilles JP, Chapman MA. Respir Physiol Neurobiol. 2016 Apr;224:52-61. doi: 10.1016/j.resp.2014.11.004. Epub 2014 Nov 13.
Recent Artistic Works
  • Intra-University Collaboration: Neurosciences Center
Research Tools
Research Facilities
E-mail Address [email protected]
Phone Number 608-262-8255
Current University UW–Madison
Department Health Sciences Library
Title Senior Academic Librarian
Other Appointments
Address Line 1 2336 Health Sciences Learning Center
Address Line 2 750 Highland Avenue
City Madison
State WI
Zip Code 53705
Bachelor's Degree B.A., University of California-Riverside, Biochemistry, 1981
Master's Degree M.S., University of California-Riverside, Biochemistry, 1982
PhD Ph.D., University of Iowa, Physiology, 1990
Other Degrees M.D., University of Iowa, 1990
Technologies Available for Licensing Microfluidic Device for High Resolution, In Vitro Monitoring of Neuronal Tissue