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Blue Book

Non-Muscular Dissection Terms

DissectionDissection
Origin The portion of a muscles attachment that is the most stable, and therfore acts as the base to move other structures
Insertion The part of a muscles attachment that is the least stable, which attaches to the structure usually moved by that muscle
Deep Fascia A vast interconnected structure, which includes the connective tissue around muscles, ligaments, tendons, viscera, nerves, and vessels
Dorsal Ramus Arising from the spinal nerve, this nerve supplies most of the tissues of the back
Medial Cutaneous Branch One of the cutaneous divisions of the Dorsal Ramus; as the name implies this division innervates the medial cutaneous regions of the back
Lateral Cutaneous Branch One of the cutaneous divisions of the Dorsal Ramus; as the name implies this division innervates the lateral cutaneous regions of the back
Superficial Fascia Loose connective tissue layer of variable thickness just deep to the skin
Cutaneous Nerves Nerve supply to the skin.
Supraspinous Ligament A cord-like ligament running between the tips of the spinous processes of the vertebrae
Nuchal Ligament An expansion of the supraspinous ligament in the cervical region
Thoracolumbar Fascia A facial sheet, or aponeurosis, that is continuous with a number of muscles and ligaments. Morover, this fascia encloses the deep musculature of the back
Greater Occipital Nerve Dorsal Ramus nerve (C2) that innervates the skin on the back of the head
Lumbar Triangle A small triangle formed by the iliac crest, latissimus and the external abdominal oblique muscle. This is an occasional site for an abdominal hernia
Spinal Accessory Nerve The nerve entering and supplying the trapezius muscle near its superior border (aka cranial nerve XI). Note, this nerve approaches from beneath the sternocleidomastoid muscle, which it also supplies
Dorsal Scapular Artery Embedded in a sheet of connective tissue that surrounds the scapula, along its medial border.
Dorsal Scapular Nerve (C5) embedded in a sheet of connective tissue that surrounds the scapula, along its medial border.
Anterior Layer of the Thoracolumbar Fascia a thick, glistening sheet that is continuous with the thoracic part of the thoracolumbar fascia and, consequently, extends between the spinous processes of the vertebrae and the ribs. Furthermore, it attaches inferiorly to the iliac crest
Middle Layer of the Thoracolumbar Fascia Forms the posterior boundary of the erector spinae group. It extends between the vertebral transverse processes and the ribs, separating the erector spinae muscles from the quadratus lumborum muscle.
Erector Spinae Aponeurosis Originating at the sacrum, this gives rise to the longissimus and iliocostalis muscle columns
Suboccipital Triangle A small area of the posterior neck that is bounded laterally by the oliquus capitis superior and obliquus capitis inferior muscles, and medially by the rectus capitis posterior major muscle
Myodural Bridge A bridge formed by a small number of deeper fibers from the rectus capitis posterior minor muscle to the dura mater lying anteriorly
Suboccipital Nerve Originating from the dorsal primary ramus of C1, this nerve should be found within the boundaries of the suboccipital triangle as it sends branches to supply each of the suboccipital muscles
Costo Transverse Ligaments Ligaments that stretch from the proximal portion of the ribs and attach to the transverse processes in the thoracic region
Intertransverse Ligaments Ligaments between the lumbar vertebrae and TV11 and TV12 that run between transverse processes
Interspinous Ligament Ligaments that stretch ventral to the supraspinous ligament and between adjacent spines
Ligamentum Flavum Ligaments between and anterior to adjacent laminae
Epidural Space Space between dura mater and the periosteum of the bony vertebral canal
Internal Vertebral Plexus An extesnsive network of veins within the epidural space
Meninges The three connective tissue envelopes of the central nervous system
Dura Mater Literally, "Tough Mother" (Like you, Morgan) . . . The outermost meningeal sheath
Posterior Longitudinal Ligament Ligament that runs along the posterior midline of the vertebral bodies
Arachnoid Mater The "spiderweb-like" meningeal layer just deep to the dura mater
Cerebrospinal Fluid (CSF) Fluid that bathes the central nervous system
Subarachnoid Space Deep to the arachnoid mater, this space contains the CSF
Posterior Spinal Arteries A plexus of vessels on the posterior surface of the spinal cord
Pia Mater "Affectionate Mother" (like you, Mike) . . . This meningeal layer intimately adheres to the spinal cord and brain
Denticulate Ligament A ligament that anchors the pia, and thus the spinal cord, to the arachnoid and dura. This is accomplished through a series fo 21 pairs of tooth-like projections that attach to the dura between the spinal nerve roots
Dorsal Roots Nerve roots entering the spinal cord on the dorsal side and contain sensory information
Ventral Roots Nerve roots entering the spinal cord on the ventral side and contain efferent motor fibers
Dorsal Root Ganglion Ganglion containing the cell bodies for afferent (sensory) neurons
Dorsal Primary Ramus Nerve branch responsible for innervation of the skin and true muscles (intrinsic) of the back
Ventral Primary Ramus Nerve branch responsible for innervating the skin and muscle of the rest of the body, except for the head
Recurrent Meningeal Nerve Nerve branch that leaves most proximally to re-enter the vertebral foramen (hence, recurrent). Innervates the dura and articular discs.
Conus Medullaris Conical ending of the spinal cord at approximately the superior portion of LV3
Filum Terminale A thin strand-like extension of the the pia mater from the conus medullaris ending at SV2
Cauda Equina A collection of nerve roots descending from the dorsal and ventral areas inferior to the thoracic spinal nerves that branch out along with the filum terminale to thier intervertebral foramen in a horse tail pattern
Created by: jharma1