. Lateral curvature of the spine and round shoulders . herefore largely move asa whole. It has been pointed out that the dorsolumbar junction is a dividingpoint for important muscular origins and insertions above and belowit, e. g., the psoas muscles originate largely below it and the trapeziusabove it, and that it forms a weak and movable part of the spine forthis reason (Ludloff), but more important than this is the fact that mus-cles connecting the thorax and pelvis will move the spine where the rigiddorsal region changes to the movable lumbar region and that a largenumber of muscles will t
. Lateral curvature of the spine and round shoulders . herefore largely move asa whole. It has been pointed out that the dorsolumbar junction is a dividingpoint for important muscular origins and insertions above and belowit, e. g., the psoas muscles originate largely below it and the trapeziusabove it, and that it forms a weak and movable part of the spine forthis reason (Ludloff), but more important than this is the fact that mus-cles connecting the thorax and pelvis will move the spine where the rigiddorsal region changes to the movable lumbar region and that a largenumber of muscles will therefore express their contraction by motionat the dorsolumbar junction. A similar Aveak and movable part ofthe spine is said to exist at the cervicodorsal junction, where importantmuscles (splenius and rhomboids) have a dividing point. spinal nerves emerge from the spinal canal through the inter-vertebral foramina and are distributed to the integument and muscles ANATOMY OF VERTEBRAL COLUMN AND THORAX. MOTOR Sterno-:mastoidTrapezius. SENSORY Neck and scalpI Neck and shoulder Shoulder Arm Hand REFLEX Scapular ■ Front of thorax -Xiphoid area Abdominalmuscles Flexors, hip Extensors, knee I ^AdductorsJ i Epigastric hip j- Abductors J Extensors(?).i Flexors, knee (?) Muscles of legmoving foot •Abdomen(Umbilicus loth) (.Buttock, upperj part Groin and scrotum(front) outer side . Thigh [ iimer sideLeg, inner sidef Buttock, lowerI part i Back of thigh Leg) and -except in-Ifoot) ner part Abdominal CremastericI Knee-jomt Gluteal Foof-clonusPlantar I Perinseal and anal |- Perinceum and anus muscles - Skin from coccyxj to anus Fig. and Table showing the Relation to the SpinalNerves OF the Various Motor, Sensory, and Reflex Functions of the SpinalCord. (Arranged by Dr. Gowers from anatomical and pathological data.)-(7l/or7-Ji s■Anatomy.) OSSIFICATION. 13 all over the body. Eight are cervical nerves (the first passing over theatlas), twelve dor
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