muscle in the body Essay Samples

muscle in the body

...o rhomboids Deep to latissimus dorsi Deep to Serratus Posterior Superior & Trapezius Deep to splenius capitus Flat, fasciculated muscle Flat, fasciculated muscle Thin, flat superolateral band Flat, fasciculated muscle 4 parallel, inferolateral fasciculi 4 parallel, inferolateral fasciculi Lower origins underlay Serratus Posterior Superior Origins are deep to Levator Scapula Insertion are Superficial to Levator origins Inserts are just lateral to trapezius origins Layer 4: 3 major muscles Erector spinae / sacrospinalis Name: Main spinal erator (action) / sacrum -> spine (attachments) 1 extensive muti-fasciculated muscle Covers entire posterior trunk Divided into 3 columns Each column divided into 3 segmental “relays” Lateral column / Iliocostalis – 3 relays Intermediate column / Longissimus – 4 relays Medial Column / Spinalis – poorly developed in humans – 3 relays Name: Most lateral finers (position) / ilia to ribs (attachments) Intermediate fibers (position) / longest column (size) Most Medial fibers ( position) / spinous processes (attachments) Lumborum (of lumbars) relay Lumborum relay indistinguishable from iliocostalis lumborum Thoracis ( of the thorax) relay Thoracis relay Thoracis relay Cervicis / colli (of the neck) relay Cervicis / colli relay Cervicis / colli relay Capitis relay – aka trachelomastoideus muscle Capitis relay = semi-spinalis capitis below Layer 5 – 4 subgroups Transversospinal muscles Name: TP -> SP, TP -> TP, SP ->SP (attachments) Semi-spinalis muscle – 3relays Thoracis relay Cervicis / colli relay Capitis relay - w/ spinalis capitus above Mutifidi Muscles Rotatores longus & brevis muscles Interspinalis muscles Name: Many parts / fasciculi (construction) Main spinal rotators (action / size) SP’s (attachments) Intermediate layer of Laminar Gutter Deepest layer of Laminar Gutter Short, single- fasciculus muscles Extensive points of origin / insertion Directly against the vertebrae Well-developed in lordotic curves More oblique than semi-spinalis fibers Short, nearly level fasciculi Brevis fasciculi deep to longus Intertransversarii muscles Name:  TPs (attachments) Short, paired muscles Cervical intertransversarii Thoracic intertransversarii Lumbar intertransversarii Anterior / Posterior paris on each side Paired with Levator Costorum Lateral / Medial pairs on each side Sub-occipital muscles – 4 single fasiculus muscles Name: directly under the occiput (position) Important in precise control of head posture All muscles palpable / chiropracticly significant Rectus capitus posterior major Rectus capitus posterior minor Superior oblique Inferior oblique Name: Shape (rectus=straight) / attachment / position / size Shape / attachment / position / size Position / orientation Position / orientation Homologous to Interspinalis muscles below Homologous to Interspinalis muscles below Homologous to Posterior Intertansversarii Single fasciculus cord-like muscle L/R muscles touch medianly Very oblique (postero-superior) Very oblique (anterolaterally) Form 1” gap between L /R insertions Directly deep to RCP Major Sub- occipital triangle = area between Superior / Inferior Obliques / RCP Major Hard to palpate between L/R RCP majors (1” gap) Anterior / pre-vertebral muscles: 4 cerv...

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