APA 2120 Lecture Notes - Lecture 4: Tennis Shots, Mental Chronometry
14 Oct 2017
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Take electrodes and put it on so(cid:373)eo(cid:374)e"s head, and an electrical current goes through the brain. Induces transient changes in neural excitability under active electrode. Results: = +20(20 millisecond slower) -20 (20 millisecond faster) We can change how the brain processes information by adding stimulation. Reactions take time and preparing for a response takes time. Preparing in advance makes reaction time faster. We use preparation to know what i need to do and when do i act. You can know what you want to do. Late reaction: 1st agonist burst, 2nd antagonist burst movement is influenced by how far it goes. Emg is reflected off of what we plan to do. Wasman et al. (1979): movement blocking: data: the size a(cid:374)d duratio(cid:374) of (cid:271)urst i(cid:374) u(cid:374)(cid:272)ha(cid:374)ged e(cid:448)e(cid:374) though the ar(cid:373) did(cid:374)"t move. But there is not enough ti(cid:373)e to k(cid:374)o(cid:449) that (cid:449)e did(cid:374)"t (cid:373)o(cid:448)e a(cid:374)d to tur(cid:374) it off: right side of dotted line: realize that our arm is blocked.
