Innervation of the Back — MCQs

Which of the following is NOT a hybrid muscle?

What is the principal nerve supply of the shown muscle among the following options?

During a knife fight, a person is injured in the neck region and presents with weakness in raising the right arm above the head. On further examination, winging of the right scapula is noted. The injury has damaged:

A patient diagnosed with sciatica has tender hamstrings. Which of the following nerves supplies a hybrid muscle that is partially spared in this patient?

Which of the following is not a branch of the cervical plexus?

In a diving accident that severed the spinal cord below the sixth cervical vertebra, which of the following muscles would be affected?

All of the following muscles have dual nerve supply, EXCEPT?

An MRI of a patient with low back pain reveals compression of the L5 nerve root. Which of the following muscles would most likely show weakness during physical examination?

Which muscle paralysis can cause winging of the scapula?

Which of the following muscles is not attached to the medial border of the scapula?