Term
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Definition
| An ascending axonal tract in the brainstem that carries tactile and proprioceptive information from the dorsal column nuclei to the thalamus. |
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Definition
| Knowing where the parts of your body are. |
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Definition
| Changes in the environment. |
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Term
| general sensory receptors |
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Definition
| Involved in tactile sensation provided by proprioceptors. Anatomically divided into unecapsulated (naked) or ecapsulated nerve endings. |
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Term
| unencapsulated (naked) nerve endings |
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Definition
| Present nearly everywhere in the body with abundance in epithelia and connective tissues. Most of the sensory fibers are unmyelinated and the distal endings have small, knob-like swellings. Examples: Merkel (tactile) discs & hair follicle receptors. |
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Term
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Definition
| Lie in the deeper layers of the epidermis and function as light touch receptors. |
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Term
| encapsulated dendritic endings |
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Definition
| Sensory neuron fiber terminals enclosed in a connective tissue capsule. Virtually all are mechanoreceptors that vary greatly in size, shape and distribution in the body. Example: Meissner's & Pacinian corpuscles. |
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Definition
| Part of the sensory system serving the body wall and limbs. |
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Term
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Definition
| The conversion of energy from a stimulus into an electrical event. |
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Term
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Definition
| FAST adapting receptors giving BURSTS of impulses at the beginning and end of the stimulus. Example: Pacinian & Meissner's corpuscles. |
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Term
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Definition
| Receptors providing a SUSTAINED response with little or NO adaptation. Example: Nociceptors & most proprioceptors. |
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Term
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Definition
| Collections of neuron cell bodies associated with nerves in the PNS. |
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Term
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Definition
| Ganglia associated with afferent nerves. |
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Term
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Definition
| Group of nerve fibers running in a specific direction. |
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Term
| spinal nerves (Total #, # of pairs in each vertebral region) |
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Definition
| 31 total pairs of mixed nerves. 8 pairs of cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal. |
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Term
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Definition
| Motor fibers that innervate skeletal muscles. |
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Term
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Definition
| Sensory fibers that arise from sensory neurons in the dorsal root ganglia. |
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Term
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Definition
| Formed by only ventral rami which criss-cross each other so that each limb receives it's nerve supply from more then one spinal nerve. The ventral rami join one another lateral to the vertebral column to form nerve plexuses. |
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Term
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Definition
| The thickest and longest nerve in the body supplying the entire lower limb. |
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Term
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Definition
| The are of skin innervated by the cutaneous branches of a single spinal nerve. |
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Term
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Definition
| Supply of nerves to a body part. |
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Term
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Definition
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Term
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Definition
| The PNS elements that activate effectors by releasing neurotransmitters. |
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Term
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Definition
| A series of knob-like swellings containing mitochondria and synaptic vesicles at an axon ending serving smooth muscle or a gland. |
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Term
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Definition
| Specific gray matter areas located deep within the white matter of the cerebral hemispheres. *see notes for functions* |
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Term
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Definition
| Highly specific neural paths with five essential components: receptor, sensory neuron, integration center, motor neuron, effector. |
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Definition
| Involves skeletal muscle. |
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Term
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Definition
| Activates smooth/cardiac muscle or glands. |
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