Somesthesis

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Can you name the HYTQ concepts?

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Which afferent muscle fibers are responsible for detecting muscle length?
These type of afferent fibers respond to high intensity mechanical and thermal stimuli and rapidly transmit highly localized pain. They often transmit SHARP PAIN…
the secondary somatosensory cortex projects primarily to which two structures in the brain?
Mechanoreceptor located in the deep dermis. It is slow acting and can detect skin stretch
development of hypersensitivity to the perception of non-noxious stimuli as pain
Which Brodmann's area of the cerebral cortex receives information from 3a about deep receptors?
True or False: Endorphinergic neurons are located in the periaqueductal gray.
the development of hypersensitivity to subsequent noxious stimuli
What system is involved in processing noiciceptive information?
True or False: Afferent Fibers Ia and II are responsible for sending infomation about the position of our body in space.
the ability to identify numbers traced on the body surface is known as what?
The V3 branch travels through what foramen or fissure?
The ability of a person to identify an object without looking at the object is known as what?
Pain, temperature, and fine touch sensations ascend to the VPM of the thalamus via what tract?
The V1 branch travels through what foramen or fissure?
Noradrenergic neurons originate where?
True or False: The secondary somatosensory cortex is involved in shape and texture discrimination.
Which Brodmann's areas project to the pre-motor and motor cortical areas?
True or False: Local anesthetics function by binding to the inactivated Na voltage gated channels preventing the influx of Na needed to initiate an action potential.
NSAIDs block which type of substance?
True or False: The fibers suppling the muscle spindles of the muscles of mastication have cell bodies within the Gasserian ganglion and they travel in the mesencephalic tract.
Which afferent muscle fibers are responsible for velocity or change in muscle stretch?
Pain and temperature fibers from the face travel in what tract to synapse in the spinal nucleus of V?
Axons of cells within the mesencephalic tract synapse where?
Small nerve afferent fibers travel in the ____ portion of the dorsal horn.
QuestionAnswer
The muscle and nociceptive afferents project to which Brodmann's Area within the cortex?
The physical sense of the position and movement of the limbs in relation to each other and the body.
The non- nociceptive cutaneous afferents project to which Brodmann's Area within the cortex?
Facial Sensory information is sent from the thalamus to the somatosensory cortices via the ____ of the internal capsule
These type of afferent fibers respond to high intensty mechanical, exogenous or endogenous chemical, and thermal stimuli. Often characterized by Dull, ACHY PAIN.. Slowly transmitte
Large nerve afferent fibers travel in the ____ portion of the dorsal horn
True or False: Thermoreceptors of the body are great at determining absolute temperature.
The V2 branch travels through what foramen or fissure?
True or False: Ectopic impulse generation is the spontaneous generation of action potentials and can occur as a result of high density of sodium voltage gated channels created in r
the receptive fields from all the neurons in one dorsal root ganglion are known as a ______.
Epipathic sensation (Fine touch, vibrations, proprioception) are carried by which tract?
Pain and Temperature fibers normally terminate Laminae ____ and ____ in the dorsal horn of the spinal cord.
True or False: Some cells of the dorsal horn and the terminals of noiceptive C fibers contain opiod and dynorphin receptors to inhibit the transmission of pain.
Which Brodmann's area of the cerebral cortex receives information from 3b about cutaneous receptors
Mechanoreceptor located in the superficial dermis. It is slow acting and can detect skin pressure/ deformation, sensation of form and texture.
True or False: Group 1a and II play a major role in the distal movements of the limbs and hands.
Fine touch sensations synapse on the _____before decussating and coursing up the VTTT.
True or False: Serotonergic neurons act to excite inhibitory enkephalinergic receptors that inhbit the transmission of pain.
True or False:According to the Gate Theory of pain modulation, The activation of large diameter afferent nerve fibers can modulate or decrease the transmission of pain sensation.
True or False: Noradrenergic neurons descending and act to excite spinothalamic tract neurons and terminals of C-fiber neurons
BA ____ projects onto BA 5 and 7 for higher sensory processing.
Propathic sensation (pain and temperature) are carried to the cortex via what pathway?
Mechanoreceptor located in the superficial dermis. It is fast acting and can detect flutter motion and slippage along skin
Mechanoreceptor located in the deep dermis. It is fast acting and can detect vibrations
Which Brodmann's Area recieves most sensory information projections from the thalamus?

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