Quantify the flow of a tactile signal from the stimulus at the finger at the peripheral nervous system (PNS), to the central nervous system (CNS), and to cognitive perception at the brain in young adults (Aim 1) and individuals with and without stroke (Aim 2).

Inclusion Criteria:

-right-hand dominance for participants who are neurotypical

For Aim 1:

-age range of 18-23

For Aim 2:

• participants who are neurotypical will be a similar age to the participants with stroke
• participants who are neurotypical will have no musculoskeletal and neurological conditions
• participants with stroke will have a single stroke incident resulting in a unilateral lesion (ischemic and hemorrhagic)
• participants with stroke will be in the chronic phase (>1 year from stroke onset)
• participants with stroke will have an onset of stroke after the age of 18
• participants with stroke who meet the criteria of having the capacity to provide informed consent, regardless of aphasia

Exclusion Criteria:

• minors
• pregnant women
• prisoners
• adults not capable of consenting on their own behalf.

For Aim 2:

• participants with stroke who have used antispastic injections in the past six months
• participants with stroke who have a lesion in the brainstem and/or cerebellum
• participants with stroke who have a stroke arising due to brain surgery
• participants with stroke who have hemineglect