NC470G齡萱

NC470G齡萱

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positron emission tomography(PET)

Imaging technique that measures live real-time cellular metabolism using radioactive substance(isotopes).

正子放射型電腦斷層攝影

postcentral gyrus

(somesthetic cortex or primary sensory cortex)─Cortical region (Brodmann area 3，1，2) behind the central sulcus that integrates sensory inputs from the body and provides sensory awareness.

中央後回

posterior cerebral artery

One of the three cortical arteries originating from the circle of Willis and supplying blood to the basal surface of the occipital and temporal lobes and the midsagittal surface of the occipital lobe.

大腦後動脈

posterior column-medial lemniscus pathways

Sensory pathways located in the dorsal third of the spinal cord.Mediate epicritic proprioception，discriminative touch，two-point discrimination，pressure，and vibration sensation. First-order fibers remain ipsilateral and project to the second-order neurons in the caudal medulla. Second-order fibers cross the midline and project to the contralateral thalamus，the site of the third-order neurons. Third-order fibers project to the ipsilateral somatosensory cortex. See MEDIAL LEMNISCAL PATHWAYS.

脊椎後纖維束

postganglionic fibers

Sympathetic and parasympathetic fibers with cell bodies un the cells of the automatic ganglia. Project to the cells in the target muscles.

神經節後纖維

postganglionic neuron

Second visceral motor neuron in an autonomic pathway with its unmyelinated axon ending at cardiac muscle，smooth muscle，or a gland.

節後神經單元

postsynaptic neuron

Neuronal surface located on the distal side of a synapse.

神經胞突後的神經元

precentral gyrus

Primary motorcortex (Brodmann area 4)，located rostral to the central sulcus.

中央前回

prechordal plate

Region of tall hypoblastic cells anterior to the notochord. With ectoderm，forms the oropharyngeal membrance.

索前板

precuneus

Parietal lobe region located in the midsagittal surface.

內側頂葉

prefrontal cortex

Recent addition to the forntal cortex，with connections to the dorsomedial thalamus，serving cogitive and personality functions.

前額葉皮質

preganglionic fibers

Sympathetic and parasympathetic fibers before synapsing on the additional autonomic ganglia.

節前神經纖維

preganglionic neurons

Autonomic nervous system neurons，with cell bodies in the spinal cord and brainstem，that project to the secondary ganglion.

節前神經元

premotor cortex

Area located anterior to the motor cortex that programs and regulates skilled movement.

前運動皮質

preoptic area

Anterior portion of the hypothalamus located above the optic chiasm.

前視區

presbyacusis

Age-induced sensorineural hering loss due to the degeneration of hair cells.

老年性失聰

presbyopia

Age-induced impairment in the lens ability to accommodate the eyes for seeing near objects.

老花眼

primary auditory cortex

Located on the superior surface of the first temporal gyrus and receiving auditory projections. Undertakes higher analysis of acoustic stimuli essential for the perception of sound.

主要聽覺皮質區

primary motor area

Precentral gyrus region of the cerebral cortex that controls specific or groups of muscles.

主要運動區

primary somatosensory area

Postcentral gyrus area of the parietal cortex responsible for somatic sensation from the body.

主要體覺區

primitive streak

Thickened region of epiblastic cells in the dorsal caudal midline of the embryo in the 3^rd week of gestation. Epiblastic cells transform into mesoderm-mesenchymal cells through this region.

原條；原線

primordium

Earliest identifiable rudiment of tissue seen during development.

原基

principal (inferior) olivary nucleus

Nucleus that projects spinal，vestibular，and reticular information to the cerebellum.

主要下橄欖體

progressive bulbar palsy

Motor neuron disease characterized by a progressive degeneration of cranial nerve nuclei in the brainstem.

漸進延髓無力症