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(Abridged) The role of low ionization nuclear emission region (LINER)galaxies within the picture of active galactic nuclei (AGN) has beencontroversial. It is still not clear whether they host an AGN in a lowaccretion mode, or whether they are not active at all but dominated byalternative ionization mechanisms, namely shocks, winds/outflows, orphotoionization by a post asymptotic giant branch (p-AGB) stellar population.The detection of extended LINER-like emission was often taken as evidence ofionization by stellar components but this has not been undisputed. We performedoptical integral field spectroscopic observations on the central approx. 4 kpcof NGC 5850 using VIMOS at the VLT, which provides spatially-resolved spectrafor the gas emission and the stellar continuum. We derive and analyse emissionline and kinematic maps. We find the central few kpc of NGC 5850 to bedominated by extended LINER-like emission. The emission-line ratios that aresensitive to the ionization parameter increase with radial distance to thenucleus. Therefore, the extended LINER-like emission in NGC 5850 is dominatedby ionization from distributed ionization sources, probably by stars on thep-AGB. The LINER-like region is surrounded by emission that is classed as'composite', likely due to a mixture of a LINER-like ionization pattern andphotoionization by low-level star formation. Two star-forming regions arepresent in the 21"x19" field of view. One of them is located approximately inthe ring surrounding the kinematically decoupled core. The second one is closeto the nucleus and is the origin of a region of decreased emission line ratiosoriented radially outwards. We find the interstellar gas to have areas of steepvelocity gradients and a complex kinematic morphology, probably caused by thelopsided (m=1) distribution of the gas. The inflow of gas toward the centerappears possible.

What produces the extended LINER-type emission in the NUGA galaxy NGC 5850?