Term
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Definition
| An elongated, encapsulated receptor found in the dermal pegs of blabrous skin, especially abundant on the lips & finger tips. |
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Definition
| An expanded tip tactile receptor found in the dermis of hairy skin that is specialized to detect continuously applied touch sensation |
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Definition
| A non-encapsulated receptor found in the epidermis of the skin throughout the body as well as in the cornea, where it signals touch, pressure and pain sensations |
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Definition
| An encapsulated receptor found deep in the skin throughout the body as well as in facial layers, where it detects indentation of the skin (pressure) and movement across the surface (vibration) |
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Term
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Definition
| The concept of specificity in sensory nerve fibers that transmit only one modality of sensation. |
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Definition
| This substance enhances the sensitivity of pain receptors but does not directly excite them. |
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Term
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Definition
| Pain receptors in the skin are classified as this |
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Term
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Definition
| True or False: An important functional parameter of Pain receptors is that they exhibit little or no adaptation. |
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Term
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Definition
| After a pain stimulus is applied, how long does it take for fast pain to be felt? |
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Term
| Type Aδ (delta) fibers, NOT Type C fibers. |
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Definition
| Which pain fibers are responsible for the localization of a pain stimulus? |
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Term
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Definition
| Which transmitter agent is used by the fast pain fibers at their synapses in the dorsal horn? |
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Term
| Activation of cAMP or cGMP |
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Definition
| In chemical synapses that involve a so-calledd 2nd messenger, typically a G-protein linked to the post-synapic receptor is activated when the neurotransmitter binds to that receptor. What is an activity performed by the activated 2nd messenger? |
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Term
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Definition
| A transmitter agent used by the slow pain fibers that is released slowly over a period of seconds or minutes at synapses in the dorsal horn. |
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Term
| Dorsal colum-medial lemniscal system |
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Definition
| This system conveys information concerning highly localized touch sensations and body position (proprioceptive) sensations. |
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Term
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Definition
| Where are first-order (primary afferent)neuronal cell bodies of the dorsal column-medial lemniscal system found? |
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Term
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Definition
| Which structure carries axons from the nucleus gracilis to the thalmus? |
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Term
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Definition
| This structure carries axons from neurons in the ventral posterolateral nucleus of the thalmus to the primary somatosensory cortex. |
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Term
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Definition
| This group of neurons in the brain's endogenous pain suppression system has cell bodies located in a portion of the midbrain. |
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Term
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Definition
| Which body parts is represented superiorly and medially within the postcentral gyrus? |
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Term
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Definition
| Which region of the pain supression pathway do neurons use serotonin as a neurtransmitter? |
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Term
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Definition
| As the receptor potential rises higher above a threshold, what happens to the new frequency of action potentials? |
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Term
| Dorsal Horn of the spinal cord |
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Definition
| An interneuron in this region uses enkephalin to inhibit pain transmission. |
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Term
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Definition
| What is the Brodmann number designation for the primary somatosensory cortex? |
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Term
| Type Aβ (beta) fibers in peripheral nerves |
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Definition
| Inhibition of pain signals by tactile stimulation of a skin surface involves which type of pain fibers? |
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Term
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Definition
| True or False: The size of the representaion of various body parts in the primary somatosensory cortex is correlated with the density of specialized peripheral receptors (aka cutaneous receptors) in that body part. |
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Term
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Definition
| The gray matter of the primary somatosensory cortex contains six layers of cells. Which layer receives the bulk of incoming signals from the somatosensory nuclei of the thalmus? |
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Term
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Definition
| True or False: Visceral pain fibers can provide input to anterolateral tract cells that also recive somatic pain signals from the skin surface. The convergent input of the two types of pain signals to a common set of spinal cord neurons is thought to be the basis for referred pain. |
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Term
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Definition
| This disorder is characterized by excessive pain in a skin dermatomal distribution resulting from a viral infection of a dorsal root ganglion. |
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Term
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Definition
| This disorder involves a loss of pain sensation on one side of the body coupled with loss of proprioception, precise tactile localization and vibratory sensations on the contralateral side of the body. |
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Term
| Lateral Medullary syndrome |
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Definition
| This disorder is characterized by the loss of pain sensation throughout one entire side of the body and opposite side of the face. |
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Term
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Definition
| This disorder causes sever, stabbing pain to one side of the face as it occurs over the sensory distribution of cranial nerves V & IX. Treatment includes severing cranial nerve V just inside the cranium where the sensory and motor functions separate. |
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Term
| No, the brain itself lack pain receptors and is therefore insensitive to pain. Stretching of the dura, tugging on the venous sinuses and stimulation to the blood vessels of the meninges however causes intense pain. |
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Definition
| Yes or NO: Does brain tissue have pain receptors? |
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Term
| Pacinian Corpuscles sense hihg-frequency repetitive stimulation (indentation or pressure) of the skin. |
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Definition
| Vibratory sensation is dependent on the detection of reapidly changing, repetitive sensations. The high frequency end of the repetitive stimulation scale is detected by which type of receptors? |
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Term
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Definition
| This neurotransmitter is associated with the locus ceruleus |
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Term
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Definition
| This neurotransmitter typically evokes inhibitory responses. |
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Term
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Definition
| True or False: In spatial summation, incresing signal strength is transmitted by using greater numbers of sensory fibers. |
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Term
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Definition
| Is the range of stimulus intensity detected by the somatosensory sytem less, more or equivalent to that of other sensory systems such as vision & audition? |
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Term
| Vasospasm & eventually ischemia in a sensory area of cortex are thought to be the basis for the prodromal symptoms associated with migranes. |
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Definition
| What is thought to be the cause of prodromal sysmptoms of migrane headaches such as nausea, loss of vision, visual aura or other sensory hallucinations? |
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Term
| It is an "all or none" process, so once intiated, the action potential runs its course to completion. |
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Definition
| Once initiate, the action potential is described as what type of process? |
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Term
| both Tactile and Joint capsule receptors. |
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Definition
| Proprioceptive sensation involves muscle spindles and ________? |
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Term
| slow conducting type C fibers |
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Definition
| Which type of sensory fibers are signals from warm receptors mainly transmitted along? |
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Term
| False: Dendrites cannot initiate or conduct action potentials, but they can transmit electrical potentials by electronic conduction. |
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Definition
| True or False: Dendrites can propagate action potentials. |
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