what could be measured and how could it be measured during contemplation

During meditation I experience sensations that I think could be measured:

• heavy limbs
• chills down my back
• chills through my body
• "champagne bubbles" up my back

What could be measured:

• skin temperature (ie thermal imaging)
• oral temperature
• eye movement; see "Precise measurement of individual rapid eye movements in REM sleep of humans"
• rectal temperature
• skin color (comparison of photographs)
• hair follicle direction (using photographs to compare)
• heart rate
• heart rate variability
• blood pressure level (before, during, and after a session)
• breath (@ chest, @ diaphragm)
• skin conductivity
• sleep stage (via a fitbit)
• blood oxygen level

Measurement methods:

• EEG (brain)
• EKG (heart)
• MRI
• cat scan, CT scan
• cortisol in saliva
• blood hormones
• urine
• stool

Body aspects to measure:

• nerves
• muscle tension
• blood
• breathing rate
• breathing capacity