THE ANTERIOR HORN CELLS OF A PHOCOMELUS IN RELATION TO THE DEVELOPMENT OF THE UPPER LIMBS
Author(s): BIEN CHANG-TAI, HAN YIA-NAN, LEU SHIH-HUADepartment of Human Anatomy Ho-Pei Medical College
Pages: 200-208
Year: 1963 Issue: 2
Journal: Acta Anatomica Sinica
Keyword: 脊髓前角; 细胞群; 脊髓颈膨大; 前角运动细胞; 外柱; 上肢骨; 正常胎儿; 肩部; 胎前; 腕部;
Abstract: We studied the gross anatomy of the upper limbs and inner structure of the cervical enlargement of the spinal cord of a phocomelus,in comparison with a normal fetus. The sections of the two spinal cords were compared as to the configuration of the white and gray matters and the relative magnitude of the motor cells in the anterior horn of the cervical enlargement. From the correspondance of the abnormal conditions of the upper limbs and the spinal cord in the phocomelus,it may be inferred that the lateral cell groups (antero- lateral,medio-lateral,postero-lateral and central) of the anterior horn normally supply the muscles of the upper and fore-arm and the shoulder region.The antero-lateral,medio- lateral,postero-lateral and central columns are small in size and few in cells;thus,the retroposterolateral column lies solitarily in the postero-lateral angle of the anterior horn. It should be the center of the digital muscles.As the retropostero-lateral column over laps partly the postero-lateral column,so it supplies jointly the muscles of the fingers and the fore-arm.
Pages: 200-208
Year: 1963 Issue: 2
Journal: Acta Anatomica Sinica
Keyword: 脊髓前角; 细胞群; 脊髓颈膨大; 前角运动细胞; 外柱; 上肢骨; 正常胎儿; 肩部; 胎前; 腕部;
Abstract: We studied the gross anatomy of the upper limbs and inner structure of the cervical enlargement of the spinal cord of a phocomelus,in comparison with a normal fetus. The sections of the two spinal cords were compared as to the configuration of the white and gray matters and the relative magnitude of the motor cells in the anterior horn of the cervical enlargement. From the correspondance of the abnormal conditions of the upper limbs and the spinal cord in the phocomelus,it may be inferred that the lateral cell groups (antero- lateral,medio-lateral,postero-lateral and central) of the anterior horn normally supply the muscles of the upper and fore-arm and the shoulder region.The antero-lateral,medio- lateral,postero-lateral and central columns are small in size and few in cells;thus,the retroposterolateral column lies solitarily in the postero-lateral angle of the anterior horn. It should be the center of the digital muscles.As the retropostero-lateral column over laps partly the postero-lateral column,so it supplies jointly the muscles of the fingers and the fore-arm.
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