sensation Flashcards
The system that provides information about the body senses, including: touch
movement
pain
skin temperature
Somatosensory System
The sensory system that provides information about the position and movement of the head, which contributes to one’s sense of balance.
Vestibular system
The vestibular structures may be divided into two types:
the otolith organs
semicircular canals
The sensory organs of the vestibular system are found in the inner ear, adjacent to the structures responsible for audition
Movement Receptors
A structure in the inner ear vestibular system that provides information about the angle of the head relative to the ground and about linear acceleration.
Otolith organ
One of three looping chambers found in the inner ear that provide information regarding the rotation of the head.
Semicircular canal
A stone made from calcium carbonate that is attached to hair cells in the otolith organs.
Otolith
the largest and heaviest organ of the human body.
provides a boundary separating what is inside from what is outside.
It prevents dehydration and protects the body from dirt and bacteria.
Skin
Human __________ is found on the lips, palms of the hands, and soles of the feet.
Glabrous Skin (Hairless skin)
2 types of skin
hairy skin and Glabrous Skin
3 layers of the skin
dermis
epidermis
subcutaneous tissue
- Outer layer of the skin
Epidermis
- The layer of skin below the epidermis.
Dermis
The layer of tissue below the dermis that contains fat and connective tissue.
Subcutaneous Tissue
- A touch receptor that responds to physical
displacement such as bending or
stretching.
MECHANORECEPTORS
The axon fibers are surrounded by a fluid-filled capsule formed of connective tissue.
Encapsulated mechanoreceptors
Two major types: ( encapsulated)
Meissner’s corpuscles
Pacinian corpuscles.
Two major types: ( non encapsulated)
Merkel’s disks
Ruffini’s endings
An encapsulated mechanoreceptor located near the surface of the skin that senses pressure.
Meissner’s corpuscles
An encapsulated mechanoreceptor located deeper in the skin, in joints, and in the digestive tract that senses pressure and vibration.
Pacinian corpuscles
A nonencapsulated mechanoreceptor located near the surface of the skin that senses pressure.
Merkel’s disks
A nonencapsulated mechanoreceptor
located deep in the skin that senses stretch.
Ruffini’s endings
refers to the length of time it will continue to respond to unchanging stimuli.
rate of adaptation
both demonstrate rapid adaptation
Meissner’s corpuscles and Pacinian corpuscles
_____ and ______ are slow adapting
Merkel’s disks and Ruffini’s endings
The pathway taken by touch information from the mechanoreceptors to the brain.
Dorsal column-medial lemniscal pathway
Cranial Nerves involved in the processing of sensory information:
Cranial Nerve V (Trigeminal nerve)
Cranial Nerve VII (Facial Nerve)
Cranial Nerve IX (Glassopharyngeal Nerve)
Cranial Nerve X (Vagus Nerve)
Pain that is perceived as arising from a missing body part.
Phantom pain
The perception of touch of a body part as arising from a missing body part.
Referred sensations
combines sensation with emotion and cognition. No other sensory modality is as dramatically affected by culture, emotion, context, and experience as our sense of _____
pain
A free nerve ending that responds to painful stimuli.
Nociceptor
