PSYC 450 Final Exam with answers.

PSYC 450 Final Exam with answers
|\ |\ |\ |\ |\




cutaneous senses - CORRECT ANSWERS ✔✔Responsible
|\ |\ |\ |\ |\ |\



for perceptions stimulated by the skin (e.g., touch and
|\ |\ |\ |\ |\ |\ |\ |\ |\



pain); Grasping, protecting against damage, motivating
|\ |\ |\ |\ |\ |\



sexual activity |\




Proprioception - CORRECT ANSWERS ✔✔Position of body |\ |\ |\ |\ |\ |\ |\



and limbs (Vestibular influences)
|\ |\ |\




kinesthesis - CORRECT ANSWERS ✔✔Movement of body
|\ |\ |\ |\ |\ |\ |\



and limbs (Vestibular influences)
|\ |\ |\




skin - CORRECT ANSWERS ✔✔1. Heaviest organ
|\ |\ |\ |\ |\ |\




2. Largest sensory system
|\ |\ |\




3. Prevents body fluids from escaping
|\ |\ |\ |\ |\




4. Protects the body from bacteria, chemical agents, dirt,
|\ |\ |\ |\ |\ |\ |\ |\ |\



etc.
5. Provides us with information about various stimuli
|\ |\ |\ |\ |\ |\ |\




Epidermis - CORRECT ANSWERS ✔✔outer layers of the
|\ |\ |\ |\ |\ |\ |\ |\



skin (dead skin cells)
|\ |\ |\

,Dermis - CORRECT ANSWERS ✔✔middle layer of skin
|\ |\ |\ |\ |\ |\ |\ |\



below epidermis |\




Mechanoreceptors - CORRECT ANSWERS ✔✔receptors |\ |\ |\ |\ |\



that respond to mechanical stimulation, like pressure,
|\ |\ |\ |\ |\ |\ |\



stretching and vibration |\ |\




Merkel receptors - CORRECT ANSWERS ✔✔found in the
|\ |\ |\ |\ |\ |\ |\ |\



valleys of finger prints; smallest receptive fields; high
|\ |\ |\ |\ |\ |\ |\ |\



spatial resolution; form and texture coding; can become
|\ |\ |\ |\ |\ |\ |\ |\



malignant; 25% of mechanoreceptors in hand |\ |\ |\ |\ |\




Meissner's corpuscles - CORRECT ANSWERS ✔✔sensitive|\ |\ |\ |\ |\ |\



touch receptors in the dermis
|\ |\ |\ |\




Ruffini cylinder - CORRECT ANSWERS ✔✔fires
|\ |\ |\ |\ |\ |\



continuously to stimulation; associated with perceiving |\ |\ |\ |\ |\ |\



stretching of skin |\ |\




Pacinian corpuscles - CORRECT ANSWERS ✔✔respond to
|\ |\ |\ |\ |\ |\ |\



deep pressure and vibration (fires when pressure is first
|\ |\ |\ |\ |\ |\ |\ |\ |\



administered and when it is removed); recording from |\ |\ |\ |\ |\ |\ |\ |\



fibers; assisted with PC shows they respond poorly to slow
|\ |\ |\ |\ |\ |\ |\ |\ |\



or constant pushing and respond well to high rates of
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\



vibration

, medial lemniscal pathway - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\



✔✔consists of large fibers that carry proprioceptive and|\ |\ |\ |\ |\ |\ |\ |\



touch information (one of two major pathways up spinal
|\ |\ |\ |\ |\ |\ |\ |\ |\



cord)


spinothalamic pathway - CORRECT ANSWERS ✔✔one |\ |\ |\ |\ |\ |\



route from the spinal cord to the brain that carries most
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\



of the information about skin temperature and pain
|\ |\ |\ |\ |\ |\ |\ |\



(smaller fibers - slower) |\ |\ |\




1. the somatosensory cortex
|\ |\ |\




2. the homunculus
|\ |\




3. cortical magnification
|\ |\




4. plasticity of S1 - CORRECT ANSWERS ✔✔What are the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\



maps of the body on the cortex?
|\ |\ |\ |\ |\ |\




two-point threshold - CORRECT ANSWERS ✔✔the
|\ |\ |\ |\ |\ |\



minimum separation between two points on the skin that
|\ |\ |\ |\ |\ |\ |\ |\ |\



when stimulated is perceived as two points
|\ |\ |\ |\ |\ |\




grating acuity - CORRECT ANSWERS ✔✔narrowest spacing
|\ |\ |\ |\ |\ |\



of grating for which orientation can be judged
|\ |\ |\ |\ |\ |\ |\ |\




raised patterns - CORRECT ANSWERS ✔✔smallest sized
|\ |\ |\ |\ |\ |\ |\



pattern or letter that can be identified
|\ |\ |\ |\ |\ |\