Voluntary movement of head, limbs, and body is caused by nerve impulses arising in the motor area of the cortex of the brain and carried by cranial nerves or by nerves that emerge from the spinal cord to connect with skeletal muscles.
- limb [lim] n.肢
- arise [əˈraiz] v.起, 发生
- cortex [ˈkɔ:teks] n. 大脑皮层
- cranial nerve [ˈkreinjəl - nə:v] n.颅神经
- emerge from [iˈmə:dʒ - frɔm] v. 自……出现
- spinal cood [ˈspainl - kɔ:d] n. 脊髓
