Sensory Systems, Lateralization, and the Sensorimotor System

Vocabulary practice flashcards covering sensory system organization and vision, hemispheric lateralization and language, and the sensorimotor system hierarchy and reflexes.

Sensation

The detection of physical stimuli and the analysis of elementary stimulus properties.

中文定义：感觉；对物理刺激的检测以及对基本刺激特性的分析。

Perception

The higher-order analysis, synthesis, and interpretation of sensations.

中文定义：知觉；对感觉信息进行的高级加工、综合与解释。

Binding Problem

The theoretical question of how the central nervous system integrates distributed neural activity across multiple sensory areas into a single cohesive conscious experience.

中文定义：结合问题（绑定问题）；指中枢神经系统如何将分布在多个脑区的神经活动整合为一个统一意识体验的理论难题。

Top-Down Mechanisms

Cognitive processes in which sensory perception is influenced by supplementing ambiguous cues with knowledge, memory, and prior experience.

中文定义：自上而下机制；利用已有的知识、记忆和经验来补充模糊感知线索的认知加工过程。

Current Model of Sensory System Organization

The organizational framework characterizing sensory systems as hierarchical, functionally segregated, and parallel in information flow.

中文定义：当代感觉系统组织模型；将感觉系统描述为具有层级结构、功能分离以及平行信息流的组织模式。

Fovea

The central retinal area characterized by a high density of cone photoreceptors and a rod-free zone of $200\,\mu\text{m}$, producing the highest visual acuity.

中文定义：中央凹；视网膜中央区域，富含高密度的视锥细胞且拥有 $200\,\mu\text{m}$ 的无视杆细胞区，具有最高的视觉敏锐度。

Completion

The cortical process by which the visual system fills in gaps using information from photoreceptors surrounding the optic disk, making individuals unaware of their blind spot.

中文定义：完形（填补）；大脑皮层利用生理盲点（视盘）周围感光细胞的信息来填补视野缺损，使人无法察觉盲点存在的机制。

Duplexity Theory

The theory that vision is mediated by two distinct systems: photopic vision (cone-mediated, high acuity, color, well-lit, low convergence) and scotopic vision (rod-mediated, low acuity, no color, dim light, high sensitivity, high convergence).

中文定义：双重视觉理论；认为视觉由明视觉（视锥细胞介导，高敏锐度、具色觉、强光适应、低聚合）与暗视觉（视杆细胞介导，低敏锐度、无色觉、弱光适应、高敏感度、高聚合）两个独立系统构成的理论。

Rhodopsin

A photopigment in rods that absorbs light and bleaches, causing the rods to hyperpolarize and transducing light into neural signals.

中文定义：视紫红质；视杆细胞中的感光色素，吸收光线后发生光漂白并导致视杆细胞超极化，从而将光转化为神经电信号。

Retina-Geniculate-Striate Pathway

The primary visual pathway that routes visual signals from retinal photoreceptors and retinal ganglion cells through the lateral geniculate nucleus (LGN) of the thalamus to the primary visual (striate) cortex.

中文定义：视网膜-膝状体-纹状皮层通路；主要的视觉传导通路，将信号从视网膜神经节细胞经丘脑外侧膝状体（LGN）传导至初级视觉皮层（纹状皮层）。

Optic Chiasm Decussation

The crossover point where retinal ganglion cell axons from the nasal hemiretinas cross the midline, while axons from the temporal hemiretinas remain ipsilateral, ensuring visual fields project to the contralateral cortex.

中文定义：视交叉交叉；鼻侧半视网膜的神经纤维在此交叉至对侧，而颞侧半视网膜纤维保持同侧，确保视野投射到对侧大脑皮层。

Lateral Inhibition

The inhibitory influence that illuminated visual receptors exert on adjacent receptors via lateral interneurons, enhancing contrast perception across edges.

中文定义：侧抑制；受光刺激的视觉感受器通过侧向中间神经元对邻近感受器产生抑制，从而强化对边界的对比度感知。

Mach Bands

Non-existent perceived stripes of brightness and darkness located along luminance edges that enhance edge contrast, arising from lateral inhibition.

中文定义：马赫带；由侧抑制现象引起的、位于亮度边界处本不存在的明暗条纹知觉，具有增强边缘对比的作用。

Receptive Field

The specific area of the visual field where visual stimuli can alter the firing rate or activity of a given visual neuron.

中文定义：感受野；视野中能够引起特定视觉神经元放电频率或活动状态发生改变的特定区域。

On-Center / Off-Center Ganglion Cells

Neurons in the retinal ganglion cells, lateral geniculate nucleus, and lower layer IV of striate cortex characterized by circular, concentric receptive fields with antagonistic center and surround response zones.

中文定义：给光-中心 / 撤光-中心神经节细胞；分布于视网膜、LGN 及纹状皮层第 IV 层下部，具有同心圆状且中心与周边相互拮抗的感受野神经元。

Simple Cells

Cells in the primary visual cortex (striate cortex) with rectangular receptive fields exhibiting distinct 'on' and 'off' zones that respond maximally to bars or edges of light at specific orientations.

中文定义：简单细胞；初级视觉皮层内具有矩形感受野的细胞，具有明确的给光/撤光区域，对特定朝向的光带或边缘反应最强。

Complex Cells

Striate cortex neurons with larger receptive fields lacking static 'on'/'off' regions, exhibiting direction-sensitivity and frequent binocularity ($\approx 50\%$) with ocular dominance.

中文定义：复杂细胞；纹状皮层内感受野较大且无固定给光/撤光分区的神经元，具方向选择性，且约 $50\%$ 表现出双眼反应及眼优势。

Scotoma

An area of blindness in the visual field produced by damage to the primary visual cortex, mapped clinically using a perimetry test.

中文定义：盲点（视野暗点）；初级视觉皮层损伤导致的视野盲区，临床上通过视野计检查绘制范围。

Blindsight

The ability of individuals with primary visual cortex damage to respond accurately to visual stimuli within their scotoma without conscious visual awareness, mediated by subcortical pathways like the superior colliculus.

中文定义：盲视；初级视觉皮层受损患者在缺乏主观意识感知的情况下，仍能对暗点内刺激做出准确反应的能力，由上丘等皮层下通路介导。

Dorsal Stream

A visual pathway projecting from primary visual cortex to the posterior parietal cortex, specializing in spatial perception ('WHERE') and the visually guided control of behavior.

中文定义：背侧通路；从初级视觉皮层延伸至后顶叶皮层的通路，专司空间感知（“在哪里”）以及视觉引导的行为控制。

Ventral Stream

A visual pathway projecting from primary visual cortex to the inferotemporal cortex, specializing in object recognition ('WHAT') and conscious perception.

中文定义：腹侧通路；从初级视觉皮层延伸至下颞叶皮层的通路，专司物体识别（“是什么”）和意识层面的知觉感知。

Visual Agnosia

A condition caused by ventral stream damage characterized by a specific inability to recognize or identify visual stimuli despite intact basic sight.

中文定义：视觉失认症；由腹侧通路受损引起的障碍，患者在基本视力健全的情况下无法辨认或识别所看到的物体。

Prosopagnosia

An inability to recognize familiar human faces, linked to structural damage in the fusiform face area (FFA).

中文定义：面孔失认症（脸盲症）；无法识别熟悉人脸的认知障碍，常与梭状回面孔区（FFA）受损有关。

Akinetopsia

Motion blindness, or the inability to perceive the smooth movement of objects, resulting from damage to cortical area MT (V5).

中文定义：运动失认症（运动盲）；无法感知物体的连续平滑运动，由皮层 MT 区（V5 区）受损所致。

Aphasia

A language deficit resulting from brain damage (typically in the left hemisphere) that causes impairment in comprehending or producing spoken language.

中文定义：失语症；通常由左半球脑损伤引起的语言功能障碍，涉及口语表达或理解能力的丧失。

Apraxia

A neurological condition characterized by difficulty performing movements on command or out of context despite retaining the ability to perform them spontaneously, typically caused by left hemisphere damage.

中文定义：失用症；在运动能力完好且能自发行动的情况下，无法按指令或脱离情境完成特定熟练动作的神经障碍，多因左半球受损引起。

Wada Test

A clinical procedure in which sodium amytal is injected into a carotid artery to temporarily anesthetize one cerebral hemisphere, rendering patients mute if the dominant language hemisphere is inactivated.

中文定义：和田试验（Wada 试验）；通过向颈动脉注射异戊巴比妥钠短暂麻醉单侧大脑半球，以评估语言优势半球的临床测试。

Dichotic Listening Test

A behavioral test of cerebral lateralization that presents competing auditory stimuli simultaneously to both ears, showing superior performance in the ear contralateral to the language-dominant hemisphere.

中文定义：双耳分听试验；向双耳同时输入竞争性听觉刺激以检验大脑偏侧化的行为测试，语言优势半球的对侧耳通常表现出识别优势。

Analytic Mode (Sperry)

Roger Sperry's concept of left-hemisphere specialization, marked by logical reasoning, sequential analysis, syntax, and verbal-based thought.

中文定义：分析模式（斯佩里）；罗杰·斯佩里提出的左半球特化概念，以逻辑推理、时序分析、句法和基于言语的思维为特征。

Synthetic Mode (Sperry)

Roger Sperry's concept of right-hemisphere specialization, marked by holistic information processing, spatial awareness, emotional nuance, prosody, and metaphor.

中文定义：综合模式（斯佩里）；罗杰·斯佩里提出的右半球特化概念，以整体信息加工、空间感知、情绪细微差异、语调韵律及隐喻理解为特征。

Planum Temporale

A cortical area located on the superior temporal gyrus showing pronounced structural anatomical asymmetry between the left and right cerebral hemispheres.

中文定义：颞平面；位于颞上回的大脑皮层结构，在左右两半球之间展现出显著的解剖形态不对称性。

Commissurotomy

A surgical resection of the cerebral commissures (primarily the corpus callosum) used to treat intractable epilepsy, creating a split-brain condition.

中文定义：脑连合切断术；切断胼胝体等大脑连合纤维以治疗顽固性癫痫的外科手术，会导致“裂脑”状态。

Cross-Cuing

An indirect communication method in split-brain patients wherein one hemisphere prompts the other using external behavioral cues or subcortical routes rather than direct transcallosal transfer.

中文定义：交叉提示（间接线索提示）；裂脑患者中一侧半球利用外在躯体行为线索或皮层下途径向另一半球传递信息的间接交流机制。

Helping Hand Phenomenon

A behavior seen in split-brain patients where one hand (guided by one hemisphere) physically intervenes to redirect the other hand (guided by the opposite hemisphere) during conflicting object-selection tasks.

中文定义：援助之手现象；裂脑患者在一侧半球指导下的手主动干预并纠正另一侧半球控制的手所进行的动作冲突现象。

Wernicke-Geschwind Model

A neurological circuit model of language describing specific pathways linking auditory cortex, visual cortex, angular gyrus, Wernicke's area, arcuate fasciculus, Broca's area, and primary motor cortex for comprehension and speech.

中文定义：韦尼克-格施温德模型；经典的语言神经回路模型，阐明了听觉皮层、视觉皮层、角回、韦尼克区、弓状束、布罗卡区和运动皮层在语言理解与产生中的协作路径。

Broca's Area

A region in the inferior left frontal gyrus responsible for planning and generating the motor programs required for speech production.

中文定义：布罗卡区；位于左额下回的皮层区域，主管言语发音运动程序的规划与生成。

Wernicke's Area

A region in the left posterior superior temporal gyrus responsible for auditory and verbal language comprehension.

中文定义：韦尼克区；位于左颞上回后部的脑区，主管口语及听觉语言的理解。

Arcuate Fasciculus

A prominent white matter tract connecting Wernicke's area directly to Broca's area, transmitting language comprehension data to motor speech generation areas.

中文定义：弓状束；直接连接韦尼克区与布罗卡区的白质神经纤维束，负责向前额叶传递语言理解信息以启动言语生成。

Angular Gyrus

A parietal-occipital cortical structure responsible for phonological recoding, translating visual representations of written words into auditory codes during reading.

中文定义：角回；顶枕叶交界区的皮层结构，在阅读过程中负责语音重编码，将书面语的视觉表征转换为听觉代码。

Motor System Hierarchy

The top-down descending organization of motor control running from association cortex to secondary motor cortex, primary motor cortex, brainstem motor nuclei, and spinal motor circuits.

中文定义：运动系统层级；运动控制由高级联合皮层向下传递至二级运动皮层、初级运动皮层、脑干核团及脊髓运动环路的自上而下结构。

Posterior Parietal Association Cortex

A multimodal association region that integrates visual, somatosensory, and auditory inputs to track body position and the spatial location of objects to guide movement.

中文定义：后顶叶联合皮层；整合多模态感觉输入（视觉、躯体感觉、听觉）以追踪身体方位和空间物体位置，用于引导运动。

Contralateral Neglect

A sensory-attentional deficit typically resulting from large lesions to the right posterior parietal cortex, characterized by a failure to respond to or perceive objects and space on the left side.

中文定义：对侧忽视（单侧空间忽略）；通常由右侧后顶叶皮层大面积损伤引起，表现为对身体及空间左侧的刺激缺乏感知和反应。

Dorsolateral Prefrontal Association Cortex (DL-PFC)

The executive planning cortex that evaluates external stimuli and initiates voluntary goal-directed decisions, firing first prior to motor output.

中文定义：背外侧前额叶联合皮层（DL-PFC）；评估外部刺激并发起目标导向性自主决定的执行中枢，放电活动优先于运动执行。

Secondary Motor Cortex

Cortical regions consisting of the supplementary motor area (SMA), premotor cortex, and cingulate motor areas that program movement patterns in response to association cortex inputs.

中文定义：二级运动皮层；由辅助运动区（SMA）、前运动皮层和扣带回运动区组成，接收联合皮层指令并编制动作程序。

Mirror Neurons

Neurons in the premotor and parietal cortices that discharge both when performing a specific goal-directed movement and when observing another individual perform the same action.

中文定义：镜像神经元；在前运动区及顶叶皮层中，无论个体自身执行目标动作还是观察他人执行相同动作都会激活放电的神经元。

Motor Homunculus

The somatotopic topographical representation of the human body mapped across the precentral gyrus of the primary motor cortex.

中文定义：运动小人；初级运动皮层中央前回上对应全身各骨骼肌运动控制的躯体解剖拓扑投射图。

Basal Ganglia (Motor Control)

Subcortical forebrain nuclei that select and initiate appropriate behavioral motor patterns while inhibiting competing or unwanted movement patterns via cortical feedback loops.

中文定义：基底神经节（运动控制）；前脑皮层下核团，通过皮层反馈环路选择并启动最佳动作模式，同时抑制不适宜的竞争性动作。

Parkinson's Disease

A hypokinetic movement disorder associated with basal ganglia dysfunction, characterized by an abnormal slowness and paucity of voluntary movements.

中文定义：帕金森病；与基底神经节病变相关的少动性运动障碍，表现为随意运动严重减少与运动迟缓。

Huntington's Disease

A hyperkinetic movement disorder associated with basal ganglia pathology, characterized by excessive, involuntary, unwilled movements.

中文定义：亨廷顿病；与基底神经节退行性病变相关的多动性运动障碍，特征为过度的、不自主的舞蹈样动作。

Cerebellum (Motor Comparator)

A brain structure that acts as a comparator, evaluating motor plans from motor cortex against somatic sensory feedback to correct ongoing motor errors and ensure smooth coordination.

中文定义：小脑（运动比较器）；通过将皮层的运动意图与躯体感觉反馈进行实时对比，纠正运动误差并保证动作协调平滑的脑结构。

Medial Descending Motor System

Brainstem motor pathways innervating neurons on both sides of the spinal cord to control postural adjustments, equilibrium, and balance.

中文定义：内侧下行运动系统；双侧支配脊髓神经元的脑干运动通路，主要负责维持姿势调节、身体平衡与稳定。

Lateral Descending Motor System

Motor pathways that project contralaterally down the spinal cord to directly contact motor neurons controlling fine, voluntary movements of the limbs and digits.

中文定义：外侧下行运动系统；对侧下行投射至脊髓并支配运动神经元的通路，专门负责四肢远端和手指的精细自愿运动。

Muscle Spindles

Receptors located within intrafusal muscle fibers that detect and respond to changes in the length (stretch) of skeletal muscle.

中文定义：肌梭；位于梭内肌纤维内部的本体感受器，监测并响应骨骼肌长度变化（牵拉刺激）。

Golgi Tendon Organs (GTO)

Sensory receptors embedded within muscle tendons that monitor and respond to mechanical tension generated during muscle contraction.

中文定义：高尔基腱器官（腱梭）；位于肌腱内部的本体感受器，感受并测量肌肉收缩时产生的机械张力。

Stretch Reflex

A monosynaptic reflex elicited when a tap stretches the tendon and intrafusal muscle spindles, producing an afferent burst that excites motor neurons and triggers contraction of the stretched muscle.

中文定义：牵张反射；叩击肌腱牵拉肌梭诱发的单突触反射，传入冲动引起脊髓运动神经元兴奋并导致被牵拉肌肉收缩（如膝跳反射）。

Central Pattern Generator

Spinal cord neural circuitry capable of generating rhythmic motor output to alternate agonist-antagonist contractions during automatic behaviors such as walking.

中文定义：中枢模式发生器（CPG）；脊髓中能够在无脑部持续输入下自发产生节律性动作输出、交替激活拮抗肌群的神经环路（如控制行走节奏）。

Spastic Paralysis

A motor impairment resulting from damage to the primary motor cortex, characterized by paralysis, increased muscle tone (rigidity), and hyperactive reflexes.

中文定义：痉挛性瘫痪（硬瘫）；初级运动皮层（上运动神经元）损伤导致的瘫痪，伴有肌张力增高（肌强直）及腱反射亢进。

Flaccid Paralysis

A motor impairment resulting from damage to lower motor neurons, characterized by paralysis, decreased muscle tone, and hypoactive or abolished reflexes.

中文定义：弛缓性瘫痪（软瘫）；下运动神经元损伤导致的瘫痪，伴有肌张力降低以及腱反射减弱或消失。

Horizontal and Amacrine Cells

Retinal interneurons that mediate lateral transmission of neural signals within retinal circuits to support contrast enhancement and signal modulation.

中文定义：水平细胞与无长突细胞；视网膜中的中间神经元，负责在视网膜回路中介导信号的横向传递，以支持边缘对比度增强和信号调节。

Striate Cortex Columnar Organization

The functional arrangement identified by Hubel and Wiesel in which neurons with similar receptive field properties, such as preferred orientation and eye dominance, cluster into vertical columns perpendicular to cortical layers.

中文定义：纹状皮层柱状构筑；休伯尔与威泽尔发现的功能组织形式，具有相同功能特性（如特定朝向和眼优势）的神经元垂直于皮层排列成功能柱。

Cerebral Commissures

Transverse white matter tracts spanning the longitudinal fissure, such as the corpus callosum and anterior commissure, that structurally interconnect and mediate communication between the cerebral hemispheres.

中文定义：大脑连合；跨越大脑纵裂连接左右两半球的横向白质纤维束（包括胼胝体和前连合），负责双侧半球间的信息交互。

Myers and Sperry Cat Experiment

A foundational study establishing that transection of both the corpus callosum and the optic chiasm prevents learned visual discrimination tasks from transferring from a trained eye to the untrained eye.

中文定义：迈尔斯与斯佩里猫裂脑实验；证实同时切断胼胝体和视交叉会阻断视觉辨别学习从一只训练眼传递到另一只未训练眼的经典神经学实验。

Frontal Operculum

The cortical area of the frontal lobe overlying the insula that contains Broca's area in the left hemisphere and demonstrates substantial anatomical asymmetry between cerebral hemispheres.

中文定义：额岛盖；覆盖于脑岛表面的额叶皮层，在左侧包含布罗卡区，且在左右两半球之间表现出明显的解剖不对称。

Heschl's Gyrus

The transverse temporal gyrus located within the lateral fissure that contains the primary auditory cortex and exhibits structural asymmetry between the two hemispheres.

中文定义：赫氏回（颞横回）；位于外侧裂内的颞横回脑区，包含初级听觉皮层，在双侧大脑半球间具有显著的结构不对称性。

Expressive Aphasia

A language disorder caused by anterior left-hemisphere lesions characterized by slow, labored, and poorly articulated speech production despite relatively intact language comprehension.

中文定义：表达性失语症（Broca 失语症）；由左半球前部损伤引起的语言障碍，表现为言语输出缓慢费力、发音困难，但语言理解能力基本保留。

Receptive Aphasia

A language disorder caused by posterior left-hemisphere lesions characterized by fluid, grammatically intact speech that lacks clear meaning, accompanied by severe comprehension deficits.

中文定义：感受性失语症（Wernicke 失语症）；由左半球后部损伤引起，表现为言语流利且语法完整但缺乏逻辑意义，同时伴有严重的语言理解缺陷。

Romberg's Sign

A clinical examination finding where a patient maintains balance with eyes open but sways or falls when closing their eyes, demonstrating that sensory visual input was compensating for defective somatosensory proprioception.

中文定义：昂伯氏征（闭目难立征）；睁眼能站稳但闭眼即摇晃或跌倒的体检阳性表现，提示患者正通过视觉代偿受损的躯体本体感觉。

Withdrawal Reflex

A protective polysynaptic spinal reflex that triggers rapid muscular flexion to pull a limb away from a noxious or painful stimulus before sensory signals reach conscious awareness.

中文定义：屈曲反射（撤避反射）；一种保护性多突触脊髓反射，在疼痛感知到达大脑意识之前，快速促发肌肉屈曲以使肢体远离伤害性刺激。

Pendular Reflexes

Exaggerated, repetitive oscillatory limb oscillations observed during tendon reflex testing that indicate cerebellar damage and impaired muscular dampening.

中文定义：钟摆样反射；腱反射引出后肢体出现异常的多次往复摆动现象，表明小脑受损及肌张力制动调节功能受损。

Locus of Motor Control Shift

The sensorimotor principle describing how practice shifts the execution of skilled behaviors down the hierarchy from conscious cortical circuits to automatic subcortical and spinal programs.

中文定义：运动控制中枢转移规律；熟练动作经长期练习后，其控制权沿运动系统层级自上而下由意识性大脑皮层转移至皮层下和脊髓自动化程序的规律。