PSYCH 220 Lecture 9: Chapter 12
Document Summary
Research using human neuroimaging has excelled in popularity recently. This is good and bad for medical science. Tool to learn about how the brain looks and functions: greatly increased our understanding of the functioning of the brain. Ca(cid:374) (cid:271)e used irrespo(cid:374)si(cid:271)l(cid:455) (cid:449)he(cid:374) it"s so a(cid:272)(cid:272)essi(cid:271)le. Must be used and interpreted carefully for valid results and conclusions. Each technique shows something different about structure and function. Different techniques take advantage of different principles of biology and physics. Magnetic resonance imaging (mri) provides detailed structural image of the brain. Different tissues in the brain are affected differently by magnetic manipulation: grey matter, white matter, cerebral spinal fluid. How it works: protons in your body are randomly oriented when. Net magnetization = 0: whe(cid:374) e(cid:374)teri(cid:374)g mri (cid:373)a(cid:272)hi(cid:374)e"s (cid:373)ag(cid:374)eti(cid:272) field, proto(cid:374)s alig(cid:374) parallel or anti- parallel to the field. Small net magnetic field: machine then emits radio frequency pulses. Measured by a coil in the mri machine.
