Chapter 11 Flashcards
Proprioception
Sense movement, action, location
Skin senses (what do they sense)
Body surface conditions
Vestibular system
Body position, movement
Interoceptive system
Sense state of internal organs
Skin sense uses
Touch, warmth, cold, pain, texture
Free nerve endings
End of neuronal dendrites (warmth, cold, pain)
Encapsulated receptors
Complex structures enclosed in memb. (Touch)
Messiner’s corpuscle (encapsulated)
Breif Burst of impulses (close to surface, pressure and detail)
Merkel’s disks (encapsulated)
Sustained response (close to surface, pressure and detail)
Pacinian corpuscles (encapsulated)
Deeper skin layer, stretch of skin, shape, grasping
Ruffini ending (encapsulated)
Deeper skin layer, stretch of skin, shape, grasping
temperature receptors (free nerve endings)
members of the transient receptor potential family of protein ion channels
pain receptors (free never endings)
3 distinct types (thermal, chemical, mechanical)
vestibular sense uses
maintain balance, head and movement info (mostly controlled by parts of the ear)
semi circular canals
fluid moves within canals to tell you where you are in relation to gravity,
saccule and utricle
semicirclar canals come off them, hair cell at bottom of utricle (bends to detect movement), both have hair cells with geltaus material on them
balance info pathway
same nerve as hearing, they travel together, info goes to somatosensory cortex and other balance involved areas (cerebellum)
dermatome
areas of skin on your body that rely on specific nerve connections on your spine
body sense info pathway
enters the spinal cord (via spinal nerves) or brain (via cranial nerves), crosses , mid-line in the medulla, head to thalamus
somatosensory cortex
projection area for body sense neurons
somatosensory cortex location
parietal lobes, behind the primary motor cortex and central sulcus
primary somatosensory cortex
fours parts, processes sensory info from body
somatotopic map
representation of the body in the somatosensory cortex with adjacent body parts represented in adjacent parts of the cortex (weird Brian human thing)
somatosensory cortex pathway
some info is extracted and then passed from thalamus to 2 subareas, process info (good, bad?) then pass to the secondary somatosensory cortex (put together and integrated)