ANTR 350 1st Edition Lecture 9Outline of Last Lecture I. Thoracic cageII. Ribs III. SternumIV. Joints of thoracic cageV. Rib dislocationOutline of Current Lecture II. Terms to knowIII. Superficial axial neck musclesIV. Back musclesCurrent Lecture-terms-bilateral contraction: both right and left sides contract-unilateral contraction: only one side contracts-ipsilateral rotation: same side rotation-contralateral rotation: opposite side rotation-ipsilateral flexion: same side flexion-superficial axial neck muscles-sternocleidomastoid-bilateral contraction flexes neck and head-unilateral contraction produces contralateral rotation-superficial to the large vessels and verves of neck-innervated by CN XI-back musclesThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-extrinsic: found on back; involved in moving the upper limbs; have attachments in back and thorax-intrinsic: attach primarily to axial skeleton; move vertebral column and head; maintain upright posture; all innervated segmentally by dorsal primary rami of spinal nerves-arranged in 3 layers: superficial, intermediate, deep-superficial layer-splenius-intermediate layer-erectorspinae-spinalis muscle-longissimus muscle-iliocostalis muscle-deep layer-transversospinalis-semispinalis muscles: 4-6 vertebrae-multifidus muscle: 2-4 vertebrae-rotatores muscle: 1-2 vertebrae;
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