Question

multiple choice question

the scalene muscles are classified as which of the following?

• muscles of facial expression
• chewing muscles
• neck extensors
• neck flexors

Explanation:

Identify the scalene muscles

The scalene muscles (anterior, medius, and posterior) are located in the lateral neck region. They originate on the transverse processes of the cervical vertebrae and insert onto the first two ribs.

Analyze the functional classification

Using the Neck Flexion and Neck Extensors knowledge points

• Bilateral contraction of the scalene muscles flexes the neck forward.
• Unilateral contraction causes lateral flexion and ipsilateral rotation of the neck.
• Therefore, they are functionally classified as neck flexors.

Evaluate the incorrect options

Using the Facial Expression Muscles knowledge point

• Muscles of facial expression (e.g., orbicularis oculi, zygomaticus) are located in the face and scalp.
• Chewing muscles (e.g., masseter, temporalis) control the mandible.
• Neck extensors (e.g., splenius capitis, trapezius) are located posteriorly and extend the head/neck.

Answer:

• Muscles of facial expression
• Chewing muscles
• Neck extensors
• Neck flexors (Correct answer)