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Gross Anatomy q4

muscles on this test

origin of splenius capitus insertion of splenius capitus o:lower ligamentum nuchae, sp T1-3 i:mastoid process, adjacent occiputal bone
origin of splenius cervicis inseron of splenius cervicis o:sp T3-6 i:tp C1-3
actions of splenius muscles u/l: laterally bend and rotate neck b/l: draw head back
superficial intrinsic back muscles splenius capitus and cervicis
origin of iliocostalis lumborum insertion of iliocostalis lumborum o: iliac crest, sacrum, thoracolumbar fascia i: angles of lower ribs
origin of iliocostalis thoracis insertion of iliocostalis thoracis o: lower ribs i: angles uppeibs
origin of iliocostalis cervicis insertion of iliocostalis cervicis o: upper ribs i: TP C4-6
most lateral column of intermediate layer of intrinsic back muscles, arising from iliac crest- inserting on ribs iliocostalis
origin of longissimus thoracis insertion of longissmus thoracis o: sacrum, iliac crest, thoracolumbar fascia i: lower 10 ribs, TP of lumbar and thoracic vertebrae
origin of longissimus cervicis insertion of longissimus cervicis o: TP upper thoracic vert i: TP cervical vert (up to C2)
origin of longissimu capitis insertion of longissimus capitis o: TP upper thoracic, articular processes lower cervical i: mastoid process
intermediate column of intermediate layer of intrinsic back muscles longissimus
origin of spinalis cervicis insertion of spinalis cervicis o: sp lower thoracic vert i: sp upper thoracic vert
spinalis cervicis often only scant fibers
spinalis capitis considered part of semispinalis capitis
action of the erector muscles b/l: extend column u/l: lateral flexion longissimus capitis extends and turns face to same side
origin of short rotators insertion of short rotators o: TP i: SP one segment above
origin of long rotators insertion of long rotators o: TP i: SP two segments above
origin of multifidus insertion of multifidus o: TP i: SP two to five segments above
general origin of semispinalis general insertion of semispinalis o: TP i: SP of vertebrae six or more segments above origin
Semispinalis Thoracis Semispinalis Cervicis Semispinalis Capitis I: SP T1-4 I: SP C2-7 I: SP occipital bone
Area of interspinalis between SP's of adjacent vertebrae, absent in thoracic area
Action of transversospinalis muscles extend column, contralateral rotation
Area and action of interansversarii between TPs of adjacent vertebrae, absent in most thoracic area, extends and ipsilaterally flexes the column
origin of rectus capitis posterior major insertion of " o: SP of C2 i: occipital bone, inferior to inferior nuchal line
origin and insertion of rectus capitis posterior minor o: posterior tubercle of C1 i: occipital bone medial to RCP major
origin and insertion of obliquus capitis inferior o: SP C2 i: TP C1
origin and insertion oobliq capitis superior o: TP C1 i: occiputal bone near inferior nuchal line
action of suboccipital muscles extend and ipsilaterally rotate head
innervation of suboccipital muscles suboccipital nerve- posterior primary division of C1
what are the borders of the suboccipital triangle obliquus capitis inferior, obliquus capitis superior, rectus capitis posterior major
structures within subocciptal tiangle suboccipital nerve, vertebral artery
origin insertion of SCM o: sternal head: manubrium, clavicular head: medial clavice i:mastoid process of temporal bone
action innervation of SCM a: extension of head, flexion of neck, ipsilateral flexion of head and neck, contralateral rotation of head and neck
origin insertion of scalenes o: TP C3-6(ant) TP C2-7(middle) TP C4-6(posterior) i: 1st rib(ant & middle), 2nd rib(posterior)
innervation action of scalenes C3-8 spinal nerves; flexion of head(ant), lateral flexion of neck(mid & post), elevate 1st rib in forced inspiration(mid), elevation of 2nd rib in forced inspiration(post)
Origin insertion on mylohyoid O: mylohyoid line of mandible, I: mylohyoid raphe, body of hyoid
Action innervation of mylohyoid CN V3 (mandibular n.), elevates hyoid, floor of mouth, tongue, for swallowing and speaking
Origin insertion of geniohyoid O: inferior mental spine of mandible, I: body of hyoid
Action innervation of geniohyoid C1 via hypoglossal (CN XII), pulls hyoid anterosuperiorly, shortens mouth floor, widens pharynx
Origin insertion of stylohyoid O: styloid process of temporal bone, I: body of hyoid
Action innervation of stylohyoid Stylohyoid branch of facial n. ( CN VII), elevates/ retracts hyoid, elongates floor of mouth
Origin insertion of digastric O: digastric fossa of mandible (ant), mastoid notch of temporal (post), I: intermediate tendon to body and greater horn of hyoid
Action innervation of digastric Nerve to mylohyoid (ant), digastric branch of facial n (CN VII) (post), depress mandible against resistance, elevate and steady hyoid during swallowing and speaking
Origin insertion of sternohyoid O: manubrium and medial clavicle, I: body of hyoid
Action innervation of sternohyoid C1-3 via ansa cervicalis, depresses hyoid after elevation during swallowing
Origin insertion of omohyoid O: superior border of scapula near suprascapular notch, I: inferior border of hyoid
Action innervation of omohyoid C1-3 via ansa cervicalis, depresses, retracts, steadies hyoid
Origin insertion of sternothyroid O: posterior surface of manubrium, I: oblique line of thyroid cartilage
Action innervation of sternothyroid C2-3 via ansa cervicalis, depresses hyoid and larynx
Origin insertion of thyrohyoid O: oblique line of thyroid cartilage, I: inferior body of hyoid and greater horn of hyoid
Action innervation of thyrohyoid C1 via hypoglossal n (CN XII), depress hyoid, elevate larynx
Created by: cooandrew



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