<unk>  evaluation at the radial artery. Recommended points to evaluate<unk>  Claudius Galen was perhaps the first physiologist to describe the<unk> . The<unk>  is an expedient tactile method of determination of systolic blood pressure to a trained observer. Diastolic blood pressure is non-palpable and unobservable by tactile methods, occurring between heartbeats. Pressure waves generated by the heart in systole move the arterial walls. Forward movement of blood occurs when the boundaries are pliable and compliant. These properties form enough to create a palpable pressure wave. The heart rate may be greater or lesser than the<unk>  rate depending upon physiologic demand. In this case, the heart rate is determined by auscultation or audible sounds at the heart apex, in which case it is not the<unk> . The<unk>  deficit (difference between heart beats and<unk> tions at the periphery) is determined by simultaneous palpation at the radial artery and auscultation at the PMI, near the heart apex. It may be present in case of premature beats or atrial fibrillation.<unk>  velocity,<unk>  deficits and much more physiologic data are readily and simplistically visualized by the use of one or more arterial catheters connected to a transducer and oscilloscope. This invasive technique has been commonly used in intensive care since the 1970s. The rate of the<unk>  is observed and measured by tactile or visual means on the outside of an artery and is recorded as beats per minute or BPM. The<unk>  may be further indirectly observed under light absorbances of varying wavelengths with assigned and inexpensively reproduced mathematical ratios. Applied capture of variances of light signal from the blood component hemoglobin under oxygenated vs. deoxygenated conditions allows the technology of<unk>  oximetry.
Pulse
Pinch 
Capillary refill
Itch
Arousal
Red reflex
Tendon reflex
Diving reflex