1、-1-,臂 丛 Nerves of the upper limb:Brachial plexus,-2-,-3-,-4-,-5-,根(root)：C5T1.分支（branches）1.Nerve to serratus anterior (long thoracic N.)胸长神经C5,6,72. Nerve to rhomboideus (dorsal scapular N.)肩胛背神经C5,-6-,翼状肩winging of the scapular,胸长神经,受损原因：Sudden pressure on the shoulder from above; carrying heavy l
2、oads on the shoulder,前锯肌,-7-,肩胛背神经,-8-,分支（branches）:仅从上干发出分支Suprascapular nerve肩胛上神经C5,6Nerve to subclavius至锁骨下肌的神经C5,6,干：Upper trunk 上干middle trunk 中干lower trunk 下干,-9-,肩胛上神经,-10-,股：anterior and posterior divisions前股和后股（此处无分支）,索：lateral, posterior and medial cords前索、后索、外侧索,-11-,外侧索的分支C5,61.Lateral
3、pectoral N.胸外侧神经C5,62. Musculocutaneous肌皮神经C5,63. Lateral root of median正中神经的外侧根,-12-,肌皮神经,-13-,内侧索的分支C8,T11.Medial pectoral N.胸内侧神经2. Medial cutaneous N. of arm臂内侧皮神经3. Medial cutaneous N. of forearm前臂内侧皮神经4. Ulnar N. 尺神经5. Medial root of median正中神经的外侧根,-14-,正中神经,尺神经,-15-,后索的分支C5-T1subscapular N.肩胛
4、下神经C5,62. Thoracodorsal N.胸背神经C7,83. Axillary N. 腋神经C5,64. Radial N. 桡神经C5-T1,-16-,subscapular N.肩胛下神经Axillary N. 腋神经Radial N. 桡神经,-17-,胸背神经 背阔肌,-18-,正中神经,-19-,皮支,-20-,猿手,肌支,除肱桡肌（桡神经）、尺侧腕屈肌、指深屈肌尺侧半（尺神经） 以外所有前臂前群肌 鱼际肌（拇收肌尺神经） 1、2蚓状肌,-21-,-22-,-23-,尺神经,-24-,皮支,-25-,肌支,尺侧腕屈肌 指深屈肌尺侧半拇收肌 小鱼际 骨间肌 3.4蚓状肌,爪
5、形手,-26-,桡神经,肌支,肱三头肌 肱桡肌 前臂后群肌,垂腕,-27-,-28-,皮支,-29-,Undue separation of the head from the shoulder： 产伤；肩部受伤；麻醉期2. 瘫痪的肌肉：三角肌、肱二头肌、肱肌、肱桡肌； 部分的冈上肌、冈下肌、旋后肌,Erbs 点,臂丛的损伤Lesions of the Brachial Plexus Erbs paralysis 麻痹(upper trunk),policemans tip hand or porters tip hand,-30-,Undue abduction of the arm2. 瘫
6、痪的肌肉：intrinsic M. of the hand(手内肌T1)；ulnar flexors of the wrist and fingers(尺侧屈腕和屈指肌C8)3. Claw hand(爪形手)：hyperextension at the metacarpophalangeal jt and flexion at the interphalangeal jt,Klumpkes paralysis麻痹(lower trunk),-31-,1.Dislocation of humerus肩关节脱位2. 涉及到的神经：musculocutaneous N.肌皮神经；lateral root of median正中神经的外侧根3.瘫痪的肌肉：肱二头肌、喙肱肌；除了手肌之外由正中神经支配的肌肉。4.不能屈腕、屈肘，前臂桡侧感觉缺失。,Injury to lateral cord 外侧束的损伤,-32-,1. Subcoracoid dislocation of humerus肩关节喙突下脱位2. 涉及到的神经：ulner N.尺神经；medial root of median正中神经的内侧根3.瘫痪的肌肉：尺神经所支配的肌肉；正中神经支配的5块手肌。4.爪形手；手和前臂尺侧感觉缺失。,Injury to medial cord 内侧束的损伤,
