title: Far field somatosensory evoked potentials in the cat.
abstract: Averaged somatosensory evoked potentials (SEP) after forepaw stimulation were recorded from skull electrodes in the cat. The cortical component of the SEP was preceded by four far-field potentials (Component I, II, III, IV). A study of these components suggests that: (1) Component I originates in the cervical spinal cord; (2) Component II is generated in the nucleus cuneatus and/or medial lemniscus; (3) Component III-A recorded widely over the skull probably reflects activity in the cerebellum and/or cerebellar pathways; (4) Component III-B seen over the somato-sensory area results from superposition of component III-A and activity in the ventral posterior nucleus of the  thalamus and (5) Component IV orginates in the sensory radiation with some contribution from the thalamus.
mesh_terms: D000344:Afferent Pathways / Q000502:physiology; D000818:Animals; D002415:Cats; D002531:Cerebellum / Q000502:physiology; D005071:Evoked Potentials; D007839:Functional Laterality / Q000502:physiology; D008526:Medulla Oblongata / Q000502:physiology; D008636:Mesencephalon / Q000502:physiology; D011930:Reaction Time; D013003:Somatosensory Cortex / Q000502:physiology*; D013116:Spinal Cord / Q000502:physiology; D013788:Thalamus / Q000502:physiology; D014110:Touch / Q000502:physiology