Posterior Spine Muscles

Which muscle is classified within the superficial layer of the posterior spine muscles?

What nerve innervates the splenius cervicis muscle?

Which type of muscle action does the splenius capitis perform when activated unilaterally?

Which of the following best describes the arrangement of muscular fasciculi in the spinaltransversales?

What is the combined action of the splenius capitis and cervicis muscles when they contract bilaterally?

Which of the following is a synonym for the posterior trunk muscles?

Which of the following muscles is located in the intermediate layer of the posterior spine?

What is the primary nerve innervation for the longissimus muscle?

Which muscle listed is the most medial component of the erector spinae muscles?

Which nerve provides the segmental root innervation to the iliocostalis muscle?

What type of muscle action results from bilateral contraction of the iliocostalis?

Considering the longissimus muscle's location, which action would it primarily assist in?

If a patient has damage to the dorsal primary ramus in the lumbar region, which muscle would likely be affected?

What is a key characteristic shared by all three muscles (iliocostalis, longissimus, and spinalis) of the intermediate layer?

Which of the following is a functional characteristic of the 'sacrospinales' muscle group?

If a patient is experiencing difficulty laterally flexing their neck, which muscle might be impaired?

Which muscle primarily functions to extend the head and neck when contracting bilaterally?

What is the consequence of unilateral weakness in the iliocostalis muscle?

Which deep muscle is crucial for stabilizing the spine by connecting spinous processes to transverse processes?

A weightlifter strains their back during an event. If the injury primarily involves muscles innervated by the DPR, which group is most likely affected?