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What middle ear parameters tell about impedance matching and high frequency hearing
Acoustic energy enters the mammalian cochlea aided by an anatomical impedance matching performed by the middle ear. The purpose of this paper is to analyse the functional consequences of changes in… Expand
Modelling the spatio-temporal modulation response of ganglion cells with difference-of-Gaussians receptive fields: relation to photoreceptor response kinetics.
Difference-of-Gaussians (DOG) models for the receptive fields of retinal ganglion cells accurately predict linear responses to both periodic stimuli (typically moving sinusoidal gratings) and… Expand
A model of the odontocete middle ear
The high acoustic sensitivity of the bottlenose dolphin is physically defined and related to the anatomy of the middle ear. The paper presents a conceptual and parametric analysis of the demands… Expand
Noise-equivalent and signal-equivalent visual summation of quantal events in space and time.
Noise recorded in visual neurons, or variability in psychophysical experiments, may be quantified in terms of quantal fluctuations from an "equivalent" steady illumination. The conversion requires… Expand
The Physics and Biology of Olfaction and Taste
Traditionally, the chemical senses include olfaction and gustation: olfaction (smell) reports on gaseous substances carried by air over long distances, and gustation (taste) provides information… Expand
pH regulation in frog cones studied by mass receptor photoresponses from the isolated retina
Mass cone photoresponses were recorded across the aspartate-treated frog retina under treatments chosen to affect putative pH-regulating mechanisms. The saturated response amplitude (Umax) was found… Expand
Rod phototransduction modulated by bicarbonate in the frog retina: roles of carbonic anhydrase and bicarbonate exchange.
- K. Donner, S. Hemilä, G. Kalamkarov, A. Koskelainen, T. Shevchenko
- Chemistry, Medicine
- The Journal of physiology
- 1 July 1990
1. Effects on rod phototransduction following manipulation of retinal CO2‐HCO3‐ and H+ fluxes were studied in dark‐adapted retinas of the frog and the tiger salamander. 2. Rod photoresponses to brief… Expand
High-frequency hearing in phocid and otariid pinnipeds: an interpretation based on inertial and cochlear constraints (L).
- S. Hemilä, S. Nummela, A. Berta, T. Reuter
- Biology, Medicine
- The Journal of the Acoustical Society of America
- 6 December 2006
Audiograms in air and underwater, determined by previous workers for four pinniped species, two eared seals (Otariidae) and two phocids (Phocidae), are supplemented here by measurements on their… Expand
Modelling the effect of microsaccades on retinal responses to stationary contrast patterns
We have modelled the effect of microsaccades on retinal responses to achromatic borders and lines using physiologically realistic parameters. Typical microsaccade movement sequences were applied to… Expand
Scaling of mammalian ethmoid bones can predict olfactory organ size and performance
- H. Pihlström, M. Fortelius, S. Hemilä, Roger Forsman, T. Reuter
- Biology, Medicine
- Proceedings of the Royal Society B: Biological…
- 7 May 2005
The relation between size and performance is central for understanding the evolution of sensory systems, and much interest has been focused on mammalian eyes and ears. However, we know very little… Expand