. A treatise on the nervous diseases of children, for physicians and students. 20 THE NERVOUS DISEASES OF CHILDREN. Muscles of Shoulders and Upper Extremity.—Continued. Name ofMuscle. La t issi-raus dor-si. Teres ma-jor. Pectoralismajor. NormalFunction. Pulls the arm,when raised,downwardand back-ward ; if armis at rest up-p e r portion,brings scap-u1 a nearerthe medianline; unitedaction of up-per third ofboth musclescauses exten-sion of dorsaltrunk ; singleaction causeslateral move-ment of trunk. Rotates raisedhumerus in-ward; adduc-tion of arm *othorax ; slighelevation ofshoulder. Clavicularp
. A treatise on the nervous diseases of children, for physicians and students. 20 THE NERVOUS DISEASES OF CHILDREN. Muscles of Shoulders and Upper Extremity.—Continued. Name ofMuscle. La t issi-raus dor-si. Teres ma-jor. Pectoralismajor. NormalFunction. Pulls the arm,when raised,downwardand back-ward ; if armis at rest up-p e r portion,brings scap-u1 a nearerthe medianline; unitedaction of up-per third ofboth musclescauses exten-sion of dorsaltrunk ; singleaction causeslateral move-ment of trunk. Rotates raisedhumerus in-ward; adduc-tion of arm *othorax ; slighelevation ofshoulder. Clavicularportion d epresses humerusraisedtion tozontal ;d u c t i o n ofarm, as ingiving a blessing ; sternalp o r t i on de-presses armc o m p letely,and if armat rest drawsacromion for-w a r d andbackward fromposi- horiad Diseases in Symptoms of Defi- Innervated Represented which Muscle is cient Action. by in commonly In-volved. Arm cannot be Sub scapu- S ixth and As in progres- moved backward ; lar, also; seventh cer- sive atrophies insufficient exten- branches of vical. and dys
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