Search Results - "Markham, Michael R"

Electrocyte physiology: 50 years later by Markham, Michael R

“…Weakly electric gymnotiform and mormyrid fish generate and detect weak electric fields to image their worlds and communicate. These multi-purpose electric…”
Get full text

Energetics of Sensing and Communication in Electric Fish: A Blessing and a Curse in the Anthropocene? by Markham, Michael R., Ban, Yue, McCauley, Austin G., Maltby, Rosalie

“…Weakly electric freshwater fish use self-generated electric fields to image their worlds and communicate in the darkness of night and turbid waters. This…”
Get full text

Editorial: Recent Advances in Electroreception and Electrogeneration by Chacron, Maurice J, Markham, Michael R

“…Specifically, when two fish are located within close proximity of one another, interference between their electric fields can create a jamming signal that…”
Get full text

A model for studying the energetics of sustained high frequency firing by Joos, Bela, Markham, Michael R, Lewis, John E, Morris, Catherine E

“…Regulating membrane potential and synaptic function contributes significantly to the energetic costs of brain signaling, but the relative costs of action…”
Get full text

Circadian and social cues regulate ion channel trafficking by Markham, Michael R, McAnelly, M Lynne, Stoddard, Philip K, Zakon, Harold H

“…Electric fish generate and sense electric fields for navigation and communication. These signals can be energetically costly to produce and can attract…”
Get full text

Electrosensory and metabolic responses of weakly electric fish to changing water conductivity by Wiser, Shannon D, Markham, Michael R

“…Weakly electric Gymnotiform fishes use self-generated electric organ discharges (EODs) to navigate and communicate. The electrosensory range for these…”
Get full text

Leptinergic Regulation of Vertebrate Communication Signals by Nourbakhsh-Rey, Mehrnoush, Markham, Michael R

“…Abstract Animal communication signals are regulated by multiple hormonal axes that ensure appropriate signal targeting, timing, and information content. The…”
Get full text

Derived loss of signal complexity and plasticity in a genus of weakly electric fish by Saenz, David E., Gu, Tingting, Ban, Yue, Winemiller, Kirk O., Markham, Michael R.

“…Signal plasticity can maximize the usefulness of costly animal signals such as the electric organ discharges (EODs) of weakly electric fishes. Some species of…”
Get full text

Electrostatic Tuning of a Potassium Channel in Electric Fish by Swapna, Immani, Ghezzi, Alfredo, York, Julia M., Markham, Michael R., Halling, D. Brent, Lu, Ying, Gallant, Jason R., Zakon, Harold H.

“…Molecular variation contributes to the evolution of adaptive phenotypes, though it is often difficult to understand precisely how. The adaptively significant…”
Get full text

Food deprivation reduces and leptin increases the amplitude of an active sensory and communication signal in a weakly electric fish by Sinnett, Philip M., Markham, Michael R.

“…Energetic demands of social communication signals can constrain signal duration, repetition, and magnitude. The metabolic costs of communication signals are…”
Get full text

A highly polarized excitable cell separates sodium channels from sodium-activated potassium channels by more than a millimeter by Ban, Yue, Smith, Benjamin E, Markham, Michael R

“…The bioelectrical properties and resulting metabolic demands of electrogenic cells are determined by their morphology and the subcellular localization of ion…”
Get full text

Action potential energetics at the organismal level reveal a trade-off in efficiency at high firing rates by Lewis, John E, Gilmour, Kathleen M, Moorhead, Mayron J, Perry, Steve F, Markham, Michael R

“…The energetic costs of action potential (AP) production constrain the evolution of neural codes and brain networks. Cellular-level estimates of AP-related…”
Get full text

A sodium-activated potassium channel supports high-frequency firing and reduces energetic costs during rapid modulations of action potential amplitude by Markham, Michael R, Kaczmarek, Leonard K, Zakon, Harold H

“…We investigated the ionic mechanisms that allow dynamic regulation of action potential (AP) amplitude as a means of regulating energetic costs of AP signaling…”
Get full text

Ionic mechanisms of microsecond-scale spike timing in single cells by Markham, Michael R, Zakon, Harold H

“…Electric fish image their environments and communicate by generating electric organ discharges through the simultaneous action potentials (APs) of electric…”
Get full text

Cellular mechanisms of developmental and sex differences in the rapid hormonal modulation of a social communication signal by Markham, Michael R., Stoddard, Philip K.

“…Some gymnotiform electric fish species rapidly modify their electric signal waveforms by altering the action potential (AP) waveforms of their electrocytes,…”
Get full text

Signal Cloaking by Electric Fish by Stoddard, Philip K., Markham, Michael R.

“…Electric fish produce weak electric fields to image their world in darkness and to communicate with potential mates and rivals. Eavesdropping by…”
Get full text

Circadian rhythms in electric waveform structure and rate in the electric fish Brachyhypopomus pinnicaudatus by Stoddard, Philip K, Markham, Michael R, Salazar, Vielka L, Allee, Susan

“…Abstract Weakly electric fish have long been known to express day–night oscillations in their discharge rates, and in the amplitude and duration of individual…”
Get full text

Adrenocorticotropic Hormone Enhances the Masculinity of an Electric Communication Signal by Modulating the Waveform and Timing of Action Potentials within Individual Cells by Markham, Michael R, Stoddard, Philip K

“…We report here that melanocortin peptides appear to serve as the mechanism by which weakly electric fish couple socially regulated and stress-regulated brain…”
Get full text

Androgens enhance plasticity of an electric communication signal in female knifefish, Brachyhypopomus pinnicaudatus by Allee, Susan J., Markham, Michael R., Stoddard, Philip K.

“…Sex steroids were initially defined by their actions shaping sexually dimorphic behavioral patterns. More recently scientists have begun exploring the role of…”
Get full text

Melanocortins regulate the electric waveforms of gymnotiform electric fish by Markham, Michael R., Allee, Susan J., Goldina, Anna, Stoddard, Philip K.

“…The hypothalamic–pituitary–adrenal/interrenal axis couples serotonergic activity in the brain to the peripheral regulators of energy balance and response to…”
Get full text