Intrinsic Muscles Flashcards
(25 cards)
What are the intrinsic muscles of the superficial back classified into?
Superficial, immediate, and deep layers.
Which muscle is part of the superficial layer of the intrinsic back muscles?
Trapezius.
True or False: The latissimus dorsi is located in the immediate layer of the intrinsic back muscles.
False.
What is the primary function of the trapezius muscle?
To elevate, retract, and rotate the scapula.
Fill in the blank: The __________ muscle is known for its role in shoulder adduction and extension.
Latissimus dorsi.
Which intrinsic back muscle is responsible for extending and rotating the head?
Splenius capitis.
What muscle group lies immediately deep to the superficial layer of the intrinsic back muscles?
Erector spinae.
Multiple choice: Which of the following is NOT a part of the erector spinae group? A) Iliocostalis B) Longissimus C) Rhomboid D) Spinalis
C) Rhomboid.
True or False: The rhomboid major and minor are classified as deep intrinsic back muscles.
False.
What is the primary role of the erector spinae muscles?
To extend and laterally flex the vertebral column.
Fill in the blank: The __________ muscle helps in retracting the scapula.
Rhomboid.
Which muscle is considered part of the deep intrinsic back muscles?
Transversospinalis group.
What is the main action of the multifidus muscle?
Stabilization of the vertebral column.
Multiple choice: Which muscle is primarily involved in rotation of the vertebral column? A) Longissimus B) Rotatores C) Iliocostalis D) Spinalis
B) Rotatores.
True or False: The semispinalis muscle is part of the immediate layer of the intrinsic back muscles.
True.
What is the primary function of the semispinalis muscle?
To extend and rotate the vertebral column.
Fill in the blank: The __________ muscles are responsible for fine motor control of the vertebral column.
Transversospinalis.
Which layer of intrinsic back muscles includes the splenius muscles?
Immediate layer.
What is the function of the iliocostalis muscle?
To extend and laterally flex the spine.
Multiple choice: Which muscle is NOT part of the superficial layer? A) Trapezius B) Latissimus dorsi C) Serratus anterior D) Rhomboids
C) Serratus anterior.
True or False: All intrinsic back muscles are innervated by the spinal nerves.
True.
What is the common origin of the erector spinae muscles?
The sacrum and iliac crest.
Fill in the blank: The __________ muscle assists in lateral flexion of the neck.
Splenius cervicis.
Which muscle is known for its role in shoulder movement and is considered intrinsic?
Latissimus dorsi.
