Week 5 EXSS 175
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This 3 page Class Notes was uploaded by Lynde Wangler on Wednesday February 17, 2016. The Class Notes belongs to EXSS 175 at University of North Carolina - Chapel Hill taught by Dr. Johna Register-Mihalik in Spring 2016. Since its upload, it has received 19 views. For similar materials see HUMAN ANATOMY in Physical Education at University of North Carolina - Chapel Hill.
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Date Created: 02/17/16
EXSS 175 WEEK 5 Muscles 1 (Quiz wed.-fri.) Erector Spinae o Illiocostalis 3 parts: cervicis, thoracis, lumborum Most lateral o Longissimus: 3 parts: capitis, cervicis, thoracis (no lumborum) Medial (between spinalis and iliocostalis) o Spinalis: 3 parts: capitis, cervicis, thoracis Closest to the spine o Transversospinalis: 3 parts: capitis, cervicis, thoracis Affects opposite side – shortens and rotates head to the opposite side o Multifidus: Run all up and down back Moves vertebral column laterally and rotates head to the opposite side Helps to maintain core stability o Rotatores: Rotates vertebral column to the opposite side Origin – transverse process of all vertebrae Cervical Region o Platysma: Attaches to skin Depresses lower jaw o Sternocleidomastoid: Superficial parts and deep to platysma Tends to accumulate tension (clinical application) Rotates head to opposite side o Anterior, medial (rotation to the same side), and posterior scalene (opposite side rotation): Laterally flex to the same side Very small and not major; common site of trigger points Scalenes can become inflamed with bad posture and can restrict blood flow Thoracic outlet syndrome – seen a lot in students and teachers restriction of blood flow due to tension Intercostal: o 1) External – more lateral; elevates ribs and helps with inhalation o 2) Internal – more medial; closer to the sternum and helps with expiration and depressing ribs External Oblique: o Most superficial abdominal muscle o Runs like you’re putting your hands in your pockets o Rotate to the opposite side Rectus Abdominis: o 6-pack o Sits just beneath your external oblique the thin tissue layer Internal Oblique: o Sits deeps to external oblique o Runs opposite; back towards the pelvis o Help flex; help to rotate to the same side Transverse Abdominis: o Muscle that runs horizontally around the abdomen o Tightens the core; compresses the abdomen Diaphragm: o Closes space in thoracic (expands thoracic) and abdominal (compresses) cavities o Aids in breathing o Phrenic nerve (C4) innervation proper respiration cannot happen without the diaphragm functioning well Quadratus lumborum: o Deep muscle of the back o Last rib to iliac crest o Common site of trigger points o Elevates hips hip shift people with lower back pain (clinical perspective) Thoracic Wall and Shoulder Girdle o Pectoralis Major: Big, fans out across chest Superficial Medial and lateral pectoral nerve Adduction in a horizontal manner Synergist (not primary) to internal rotation o Servatus Anterior: Protract scapula “punching” muscle Frontal/lateral side of ribs Long thoracic nerve o Pectoralis Minor: Deeper and smaller than major; only innervated by medial pectoral nerve Anterior muscle of thorax Elevates ribs during respiration and moves scapula downwards o Trapezius: Upper, middle, lower Superficial o Latissimus Dorsi: Superficial Attaches to humerus Adduct humerus o Rhomboideus: (major/minor) Scapular retraction Minor is deeper and smaller o Levator scapula: Elevates scapula Superior to scapula and rhomboideus (major and minor)
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