Jan van Kessel the Younger are attributed about 200 small still lifes produced in Southern Europe in the late 16th and early 17th century. Jan van Kessel the Younger's small known authentic oeuvre is different in style and execution and substantially higher in quality than the works, which have now been attributed to Pseudo Jan van Kessel the Younger. His portrait style was described by his contemporary Antonio Palomino as very close to that of his fellow Flemish painter Anthony van Dyck. Van Kessel was a specialist of the genre of group portraits. An example is the "Portrait of a family in a garden" in
Christopher H. van Dyck Disease. Using SPECT imaging of the Dopamine transporter, van Dyck’s work has shown that there is loss of dopamine from the aging striatum, and that this is related to a slowing of reaction time, a measure of mental chronometry. van Dyck uses PET imaging to track Alzheimer’s-related pathology, to learn how pathology relates to ApoEApoE genotype, and whether it is diminished by potential treatments. Dr. van Dyck has collaborated with Dr. Richard Carson at the Yale PET Center to test the new PET ligand 11C-UCB-J, which binds to SV2A to provide an assay of presynaptic axon terminals in the human