Questions and Answers
What is the primary function of the bilateral action of the superficial layer muscles of the neck?
Which nerve is associated with the splenius muscles in the superficial layer of the neck?
What unilateral action is performed by the splenius muscles?
Which of the following correctly identifies the muscles within the superficial layer of the neck?
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What is the term used to describe the action of splenius muscles when turning the head to the same side?
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Study Notes
Superficial Layer Muscles
- Splenius Capitis and Splenius Cervicis are muscles located in the superficial layer of the neck.
- Dorsal Primary Ramus (DPR) nerves innervate these muscles, providing motor control and sensory function.
- Each muscle has segmental roots that correspond to specific spinal nerve levels, influencing their activity.
Actions of Splenius Muscles
- Bilateral Action: These muscles work together to extend the head and neck, aiding in maintaining an upright posture.
- Unilateral Action: When one side contracts, it leads to lateral flexion of the neck and rotation of the head to the same side, promoting neck mobility.
- The actions are described as ipsilateral, meaning that the muscle on one side influences movement to that same side.
Specifics of Muscles
- Capitis refers to the portion of the splenius that attaches to the skull, influencing head movement.
- Cervicis pertains to the portion that connects to cervical vertebrae, affecting neck alignment and motion.
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Description
Test your knowledge of superficial layer muscles, including splenius capitis and splenius cervicis. This quiz covers their functions, nerve supply, and anatomical actions related to head and neck movements.
