PSY210H5 Lecture Notes - Lecture 4: Palmar Grasp Reflex, Startle Response, Sciatic Nerve
Document Summary
Permanent: eye blink: response strong throughout life, withdrawal relex: absence indicates sciaic nerve damage. Temporary: babinski: toes curl up; absence indicates lower spine deicits; disappears near end of irst year, moro (startle relex): absence indicates cns deicits; disappears around 6-7 months, palmar grasp: absence indicates depression. Disappears between 3-4 months: plantar (toe grasp): absence indicates lower spine deicits. Disappears between 8-12 months: rooing: absence indicates depression. Disappears between 3 and 4 months: stepping: absence indicates depression. Disappears between 3 and 4 months: sucking: may be iniially weakened in babies whose moms medicated during childbirth. Newborn repertoire of relexes which are involuntary responses to external simuli. Many relexes have obvious value in helping newborn survive. Many disappear during 1st year of life. Tests of relexes may be combined with other assessments to gauge health, maturity and capaciies of newborn. Time spent in these 2 states changes over course of development.
