The Torso Region: Muscles
Trapezius
Upper back muscle Extends from the clavicle over the shoulder to the lumbar region Also extends from the shoulders "up" the neck to the occipital region of the skull
What is the major superficial upper back muscle and what is the major superficial lower back muscle?
Upper: Trapezius Lower: Latissimus dorsi
Internal oblique
Deep to the external oblique Extends from the latissimus dorsi and wraps around the abdomen to the anterior side forming a sheath that splits so part of the sheath covers the anterior portion of the rectus abdominis and part covers the posterior portion of the rectus abdominis
Transversus abdominis
Deep to the internal oblique Extends from the latissimus dorsi and wraps around the abdomen forming a sheath that covers the posterior portion of the rectus abdominis
Iliocostalis thoracis
Elongated muscle lateral to the longissimus thoracis
Longissimus thoracis
Elongated muscle lateral to the spinalis thoracis
Spinalis thoracis
Elongated muscle nearest the spinal column
The anterior wall and the posterior wall of the rectus sheath envelop what abdominal muscle?
Envelops the rectus abdominus
Erector spinae muscles
Group of muscles deep to the latissimus dorsi and trapezius
On what bone does the pectoralis major muscle insert?
Humerus
What structure of the humerus does the latissimus dorsi attach to?
Intertubercular sulcus
External oblique
Lateral muscle of the abdomen Extends from the latissimus dorsi muscle around to the anterior side forming a sheath that covers the rectus abdominis muscle
Latissimus dorsi
Lower back muscle Covers most of the lumbar region Extends from the lumbar region and curves around the anterior side to insert in the area intertubercular groove
Pectoralis major
Major chest muscles of the anterior thoracic region
Rectus abdominis
Muscles of the abdomen that form two vertical columns - Segmented - Ensheathed in the rectus sheath - Each segment is divided by distinct, transverse tendinous material called the tendinous inscriptions - Linea alba: Sheath of the left rectus abdominis and the sheath of the right rectus abdominis form vertical dense tissue
There are two teres muscles. One is part of the rotator cuff muscles and one is not. What are their names?
Part: Teres minor Not part: Teres major
Anterior torso muscles consist of:
Pectoralis major Rectus abdominalis External oblique Internal oblique Transversus abdominis
Identify the muscle that is enclosed by the anterior and posterior rectus sheath
Rectus abdominus
Lateral to the pectoralis major muscle (near the axilla region) is the XXX muscle.
Serratus anterior
Name the erector spinae muscles from medial to lateral
Spinalis thoracis Longissimus thoracis Iliocostalis thoracis
What is the name of the transverse connective tissue that "divides" the segments of the rectus abdominis muscle?
Tendinous intersections
Which muscle is NOT part of the rotator cuff?
Teres major
Which is the most lateral erector spinae muscle?
The iliocostalis thoracis
What muscle forms part of both the anterior and posterior sheath that encloses the rectus abdominis muscle?
The internal oblique
What muscle is associated with the thoracolumbar fascia?
The latissimus dorsi
What is the name of the vertical connective tissue that "divides" the rectus abdominis muscle?
The linea alba
What muscle connects to the lateral edges of the sternum?
The pectoralis major
The iliopsoas extends into the abdomen and is made of two muscles: psoas major and iliacus. Which extends farther into the abdomen?
The psoas major
The tendinous intersections are located on the surface of the XXX muscle?
The rectus abdominis
Which muscle is more superior in the upper back?
The rhomboid minor
What is the major superficial muscle of the upper back?
The trapezius
What is the deepest of the muscles listed? Transversus abdominis External oblique Internal oblique
Transversus abdominis External oblique Internal oblique
Posterior torso muscles consist of:
Trapezius Latissimus dorsi Erector spinae muscles - Spinalis thoracic - Longissimus thoracic - Iliocostalis thoracic