Spinal cord, major nerve tract of vertebrates, extending from the base of the brain through the canal of the spinal column. It is composed of nerve fibres that mediate reflex actions and that transmit impulses to and from the brain. The spinal cord and t
Finally, the coccygeal nerves (the last pair of spinal nerves) exit the vertebral canal at the inferior end of the sacrum and pass anterior to the coccyx. Histology The spinal cord is made of nervous tissue organized into two major types: gray matter and white matter. Gray matter is ...
Anatomy: Spinalcord: •Extendsfrommedullaoblongata–L 1 •Lowerparttaperedtoformconus medullaris Onthesurface: •Deepanteriormedianfissure •Shallowerposteriormediansulcus Spinalcordsegment: •Sectionofthecordfromwhichapairof spinalnervesaregivenoff Hence:31pairsofspinalnerves: 8cervical 12thoracic 5...
Therefore, the 12 pairs of cranial nerves, which arisefrom the brain, and the 31 pairs of spinal nerves originating from the spinal cord with their associated ganglia are, by convention, part of the peripheral nervous system. Both the brain and spinal cord are organized into gray matter, ...
nerves L2 to S1 comprise the cauda equina within the subarachnoid space called the lumbar cistern. The spinal cord has two significant enlargements at the cervical and lumbar regions for brachial and lumbosacral plexus. In the thoracic region, the width of the spinal cord ranges between 0.64 to...
Spinal Cord and Brain Anatomy ID: 137121191 收藏 加入清单 下载版权Nerthuz TIFF大小 57.2MB 格式JPG 编辑图片 以图搜图 大图:4000× 5000 像素·33.87 cm × 42.33 cm·300dpi·JPG 中图:800× 1000 像素·28.22 cm × 35.28 cm·72dpi·JPG 小图:400× 500 像素·14.11 cm × 17.64 cm·72dpi·...
The spinal cord has a small diameter, it lies within a rigid bony canal and it contains important neural elements. Therefore, relatively small lesions within the parenchyma or in the extraaxial space often present with serious neurologic deficits. For these reasons, imaging of the spine and ...
Spinal Cord and Spinal Nerves【医疗课件】 Ch 14: Spinal Cord and Spinal Nerves Resides inside vertebral canal Extends to L1/ L2 31 segments, each associated with a pair of dorsal root ganglia Two enlargements 1. Cervical Enlargement Spinal Meninges Inferior End of Spinal Cord Conus medullaris -...
Thespinalnerves Therelationbetweenthecordandspine Theanatomyofthespinalcord 1.Externalcomponents: Theupperandlowerbournofthecord Length:42~45cm,Itisthecontinuationofmedulla(occipitalforamen).Thelowerendformsterminalcone.Itoccupies2/3lengthofthespine. Lumbarenlargement:L1~S2,cervicalenlargement:C5~T2 Terminalfil...
The spinal cord is a long, tube-like structure extending from the base of your brain (the brain stem). It’s made of a collection of nerves and is encircled and protected by the bones of the spine (vertebrae). Spinal Cord Anatomy ...