Chapter 10 - Section 10.2 - Study Guide - Assess Your Learning Outcomes - Page 371: 12

It seems like you've provided a statement about muscles involved in neck movement. The statement mentions several muscles that play a role in flexing and extending the neck. Let's break down the information: 1. **Sternocleidomastoid:** The sternocleidomastoid muscle is a major muscle in the neck that has two heads (sternal and clavicular heads). It helps in various movements of the neck, including flexion (bringing the head forward), rotation (turning the head to the opposite side), and lateral flexion (tilting the head to the side). 2. **Scalene Muscles:** There are three scalene muscles on each side of the neck: anterior, middle, and posterior scalenes. These muscles assist in neck flexion and also play a role in lateral flexion and rotation of the neck. 3. **Trapezius:** The trapezius muscle is a large muscle that covers the upper back and extends into the neck. It is involved in several movements, including neck extension (pulling the head backward), as well as shoulder and scapular movements. 4. **Splenius Capitis:** The splenius capitis muscle is located in the upper back and neck. It helps extend and rotate the head and neck. 5. **Semispinalis Capitis:** The semispinalis capitis muscle is a deep muscle that runs along the spine. It also contributes to neck extension and rotation. These muscles work together to allow for a wide range of movements in the neck, from flexion to extension and rotation. They are essential for various activities like looking up and down, turning the head, and maintaining proper posture.

It seems like you've provided a statement about muscles involved in neck movement. The statement mentions several muscles that play a role in flexing and extending the neck. Let's break down the information: 1. **Sternocleidomastoid:** The sternocleidomastoid muscle is a major muscle in the neck that has two heads (sternal and clavicular heads). It helps in various movements of the neck, including flexion (bringing the head forward), rotation (turning the head to the opposite side), and lateral flexion (tilting the head to the side). 2. **Scalene Muscles:** There are three scalene muscles on each side of the neck: anterior, middle, and posterior scalenes. These muscles assist in neck flexion and also play a role in lateral flexion and rotation of the neck. 3. **Trapezius:** The trapezius muscle is a large muscle that covers the upper back and extends into the neck. It is involved in several movements, including neck extension (pulling the head backward), as well as shoulder and scapular movements. 4. **Splenius Capitis:** The splenius capitis muscle is located in the upper back and neck. It helps extend and rotate the head and neck. 5. **Semispinalis Capitis:** The semispinalis capitis muscle is a deep muscle that runs along the spine. It also contributes to neck extension and rotation. These muscles work together to allow for a wide range of movements in the neck, from flexion to extension and rotation. They are essential for various activities like looking up and down, turning the head, and maintaining proper posture.