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后索-内侧丘系通路
学习目标
完成本学习单元后，你将能够：
- 辨认后索-内侧丘系通路的组成部分。
- 描述后索-内侧丘系通路的行程。
- 讨论后索-内侧丘系通路传导的感觉信息类型。
浏览图谱
后索-内侧丘系通路是中枢神经系统的一条感觉通路，它传导来自皮肤和关节的精细触觉、两点辨别觉、本体感觉和振动觉信息。它的名称来源于构成后索-内侧丘系通路的两个主要结构：
- 后索：通过脊髓的后索传导信息，并终止于延髓。它由两大束神经纤维组成：薄束和楔束。
- 内侧丘系：后索在脑干内的延续，将信息携带至丘脑，丘脑随后将其通过内囊中继至躯体感觉皮质。
:watermark(/images/watermark_5000_10percent.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/overview_image/714/9shmtoPv3LA7rESQViFIw_posterior-column-medial-lemniscus-pathway-pcml_cn.jpg){kind=logo}
在下方的图谱集中仔细观察后索-内侧丘系通路。
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/posterior-column-medial-lemniscus-pathway/OgqILfpqKwTRJ7sx9dbLNA_posterior-column-medial-lemniscus-pathway.jpg "后索-内侧丘系通路 (Posterior funiculus-medial lemniscus pathway)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/lumbar-part-of-spinal-cord/24A7bgWJVDJjoU2z4TrA_T1002_FINAL_Posterior_Column_Pathway_copy.png "腰髓 (Lumbar part of spinal cord)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/cervical-part-of-spinal-cord/NAMJykZ1SBheGc8fnUTkZg_cervical-part-of-spinal-cord.jpg "颈髓 (Cervical part of spinal cord)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/rostral-medulla-1/jtfAX57msDrh56rduSj4kw_rostral-medulla-1.jpg "延髓上部 (Superior part of medulla oblongata)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/cerebral-peduncle-4/TorRtsKc2gJW1PdKpnZmsQ_cerebral-peduncle-4.png "大脑脚 (Cerebral peduncle)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/midbrain-4/hxS3hZ0ZHrz07OsKM9Inw_midbrain-4.jpg "中脑 (Midbrain)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/dorsal-root-ganglion-1/aYmNSj85XsdREercRyf2rA_dorsal-root-ganglion-1.jpg "脊神经节 (Spinal ganglion)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/gracile-fasciculus-2/6UUDucXUtAfrwjHqSgt0g_gracile-fasciculus-2.jpg "薄束 (Gracile fasciculus)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/cuneate-fasciculus-2/M7shvbmq5yo7nWQoRCsHA_cuneate-fasciculus-2.jpg "楔束 (Cuneate fasciculus)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/gracile-nucleus-1/TjkZYRpYOWF9M9lMyAU7Q_gracile-nucleus-1.jpg "薄束核 (Gracile nucleus)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/cuneate-nucleus-2/Z2MyQFATR9o7nXMSQOAPg_cuneate-nucleus-2.jpg "楔束核 (Cuneate nucleus)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/internal-arcuate-fibers-1/uQpYjnprcHRWksDaCSuL0w_internal-arcuate-fibers-1.jpg "内弓状纤维 (Internal arcuate fibers)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/medial-lemniscus-2/6H4mCJLlJjrNPGkv7MUKA_medial-lemniscus-2.jpg "内侧丘系 (Medial lemniscus)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/ventral-posterolateral-nucleus-of-thalamus/2HWHBpheWy89AUtc65GtuA_ventral-posterolateral-nucleus-of-thalamus.jpg "腹后外侧核 (Ventral posterolateral nucleus)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/postcentral-gyrus-4/joRrKBD6oPiYRbZNOEIgAg_postcentral-gyrus-4.jpg "中央后回 (Postcentral gyrus)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/proprioception-and-position-fibers-to-the-lumbar-spinal-cold/9AyMeOqeC4HzyXftVB8sdg_proprioception_and_position_fibers_to_the_lumbar_spinal_chord.png "腰髓本体感觉传入纤维 (Proprioceptive afferent fibers to lumbar spinal cord)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/spinocervical-tract/W5TYkg6BmE3uIeirAW7BzQ_spinocervical_tract.png "颈髓 (Spinocervical tract)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/proprioception-and-position-fibers-to-the-cervical-spinal-cord/DsMVNVaRdx2JFRiAWZMcg_proprioception_and_position_fibers_to_the_cervical_spinal_cord.png "颈髓本体感觉传入纤维 (Proprioceptive afferent fibers to cervical spinal cord)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/touch-pressure-and-vibration-fibers-to-the-cervical-spinal-cord/kcjKrvLCM27kuTZuz9Wuug_Touch__pressure__and_vibration_fibers_to_the_cervical_spinal_chord.png "颈髓机械感觉传入纤维 (Mechanoreceptive afferent fibers of cervical spinal cord)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/lateral-cervical-nucleus/tNCJYUZaZ3jsUOlLsFSxig_lateral-cervical-nucleus_magni.png "颈外侧核 (Lateral cervical nucleus)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/substantia-nigra-7/9jyr2FvdeYGpnbvr3X5GQ_substantia-nigra-7.jpg "黑质 (Substantia nigra)；图像：Paul Kim"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/periaqueductal-gray-1/a0MzdiTeGED1ivdqRO3mA_periaqueductal-gray-1.jpg "导水管周围灰质 (Periaqueductal gray substance)；图像：Paul Kim"){kind=logo}
后索-内侧丘系通路
Posterior funiculus-medial lemniscus pathway
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同义词：
后索内侧丘系通路
进行测验
学习上述图谱后，利用我们为后索-内侧丘系通路定制的测验来测试并巩固你所学的内容！
小结
| 组成 |
后索：脊髓 内侧丘系：脑干 |
| 行程 | 外周感觉感受器 → 脊神经节 → 薄束 / 楔束 → 薄束核 / 楔束核 → 内弓状纤维（交叉）→ 内侧丘系 → 丘脑的腹后外侧核 → 初级躯体感觉皮质 |
| 功能 | 传导来自皮肤和关节的精细触觉、振动觉、本体感觉和压觉感觉信息的感觉通路 |
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