Give four clinical features of Erb's palsy,facial nerve injury and laryngeal nerve injury?

Erb's palsy:
1. Weakness or paralysis of the arm, particularly affecting the shoulder and elbow
2. Limited range of motion in the affected arm
3. Muscle atrophy in the affected arm
4. Lack of sensation in the affected arm

Facial nerve injury:
1. Facial droop or asymmetry
2. Difficulty closing one eye or blinking
3. Drooling or difficulty controlling saliva
4. Altered sense of taste or loss of taste on one side of the tongue

Laryngeal nerve injury:
1. Hoarseness or changes in voice quality
2. Difficulty swallowing or choking sensation
3. Breathing difficulties, particularly during exertion
4. Persistent cough or throat clearing.

Erb's palsy

- Arm hangs by the side and is internally rotated
- Loss of supination and external rotation of the arm
- Impaired abduction of the arm
- Gripes the examiner's little finger with the thumb and index finger

Facial nerve injury

- Inability to close the eye (lagophthalmos) with resultant corneal ulceration
- Inability to wrinkle the forehead
- Inability to flare the nostril
- Loss of taste on the ipsilateral half of the tongue

Laryngeal nerve injury

- Hoarseness
- Dysphagia
- Drooling of saliva
- Difficulty breathing