Lower Motor Neurone
Also written as LMN.
A lower motor neurone facial palsy (the forehead is also weak, so the eye will not close) after a viral illness is Bell palsy.
What our notes say
- A lower motor neurone facial palsy (the forehead is also weak, so the eye will not close) after a viral illness is Bell palsy. (Paediatrics end of fourth year special supplementary exam: August 2019, Paper On)
- An isolated lower motor neurone facial palsy after a viral illness is Bell palsy. (Paediatrics end of fourth year main exam: 1 July 2019, Paper One, 99 of 100 MCQs)
- | Lower motor neurone (LMN) | Wasting, fasciculation, ↓ tone, reduced/absent reflexes | (CNS History Taking & Neurological Exam Guide | Clinical Skills)
Study material on Lower Motor Neurone
Practice questions on Lower Motor Neurone
A somatic lower motor neurone ---
- Innervates fewer fibres in an eye muscle than does one innervating a leg muscle.
- Conducts impulses at a speed similar to that in an autonomic postganglionic neurone.
- Is unmyelinated.
- Conducts impulses which cause relaxation in some skeletal muscles.
- Synapse with skeletal muscle but not with other neurones.
Answer: A.