HTHSCI 1H06 Lecture Notes - Lecture 4: Brainstem, Nerve Root, Muscle Weakness
10 Feb 2015
School
Department
Course
Professor
Document Summary
Appendicular skeleton upper limbs & lower limbs. Axial skeleton skull, mandible, vertebrae (7 cervical, 12 thoracic, 5 lumbar), sacrum. Body wall left and right dorsal extensors (back) left and right ventral flexors (front) Movement of vertebral column flexors of spine (ventral rami) bending of spine towards front. 1: extensors of the spine (dorsal rami) bending of spine towards back, circumduction and lateral bending of the spine by flexors and extensors a. spinal cord controls muscle compartments sequentially. Muscles of anterior body wall flexors of spine: external oblique hands in pockets , rectus abdominus straight up and down, internal oblique under external oblique (creates body cylinder, transversus abdominus form rectus sheath. All 4 muscles are innervated by ventral ramus of mixed spinal nerve: motor to flexors of spine, sensory to skin on anterior surface, extensors of spine, antagonistic to anterior muscles, erector spinae, superficial group. Transverse-spinal system: multifidus, rotatores, deep group - small, rotators of spine, twisting motion, upwards and medial.
