7.3 7.5 Flashcards
A term that is often used synonymously with “sensory pathway” is ___.
ascending pathway
The primary sensory cortical area and the region of association cortex closest to it process information ___.
in simple ways and serve basic sensory-related functions
Patients who have lost a body part by accident or amputation sometimes experience sensory perception in that part as though it were still present. This phenomenon is called ___ ___.
phantom limb
Sensation from the skin, skeletal muscles, bones, tendons, and joints, which is initiated by a variety of sensory receptors, is termed ___ ___.
somatic sensation
In general, mechanoreceptors are highly specialized neuron endings that are linked to networks of ___ fibers within a capsule is often filled with fluid. These networks transmit the mechanical tension in the fluid-filled capsule to ___ channels in the neuron endings and activate them.
collagen; ion
Which statement is true about sensory neural pathways?
They are afferent pathways generally formed by chains of three or more neurons that carry information to the central nervous system.
T/F: The cortical association areas are not considered part of the sensory pathway.
T
Sensory receptors located in skeletal muscles that contribute to posture and movement by indicating muscle length are called ___ ___ stretch receptors.
muscle spindle
The actual temperature sensors are ion channels in the plasma membranes of the axon terminals that belong to a family of proteins called ___ ___ ___ (TPR) proteins.
transient receptor potential
What receptors are somatic sensory receptors?
- thermoreceptor
- skin pressure receptor
- proprioceptor
Nociceptor fibers typically have a ___ diameter and are ___.
small; unmyelinated
Match the sensory receptors at left with the correct descriptions.
Meissner’s corpuscle: rapidly adapting; touch and pressure
Merkel’s corpuscle: slowly adapting; touch and pressure
Free neuron ending: slowly adapting; nociceptors, itch, thermoreceptors, and mechanoreceptors
Pacinian corpuscle: rapidly adapting; vibration and deep tissue
Ruffini corpuscle: slowly adapting; skin stretch
The sensation felt along the medial aspect of the left arm during a heart attack, which in reality occurs due to the stimulation of visceral pain pathways, is an example of ___.
referred pain (results from the convergence of somatic and visceral pain pathways)
Receptors for body movement, limb positions, fine touch discrimination, and pressure, connect with the somatosensory pathway called the ___ ___ pathway.
dorsal column
Mechanoreceptors that monitor tension on tendons are called ___ ___ organs.
golgi tendon
