Midterm Week #4 Content Flashcards
What are the three main regions of the upper limb muscles?
Shoulder, Forearm, Hand
Name two superficial shoulder muscles.
- Trapezius
- Deltoid
What is the action of the Supraspinatus muscle?
Abduction of the arm
Which muscle is the primary elbow flexor?
Brachialis
Fill in the blank: The _______ muscle assists in elbow flexion.
Brachioradialis
What is the action of the Triceps Brachii?
Extends elbow, stabilizes shoulder
Which muscle is responsible for wrist flexion and abduction?
Flexor Carpi Radialis
What are the thenar muscles responsible for?
Thumb control
Name one intrinsic hand muscle and its function.
Lumbricals – Flex MCP, extend IP joints
What is the origin of the Trapezius muscle?
Occipital bone, spinous processes (C7-T12)
What is the action of the Deltoid muscle?
Arm abduction, flexion, extension
True or False: The diaphragm is the main muscle for breathing.
True
List the muscles of the Erector Spinae group.
- Iliocostalis
- Longissimus
- Spinalis
What role do the gluteal muscles serve?
Hip stability and movement
What is the action of the Rectus Abdominis muscle?
Flexes spine, stabilizes pelvis
Fill in the blank: The _______ muscle abducts the thumb.
Abductor Pollicis Longus
What are the two main functions of the quadratus lumborum?
- Lateral flexion
- Stabilizes pelvis
What is the action of the Biceps Brachii?
Flexes elbow, supinates forearm
What is the insertion of the Gluteus Maximus?
Iliotibial tract, femur
What muscle group is responsible for knee extension?
Quadriceps Femoris
Name the deep lateral rotators of the hip.
- Piriformis
- Obturator Externus
- Obturator Internus
- Superior Gemellus
- Inferior Gemellus
- Quadratus Femoris
What is the origin of the Flexor Pollicis Longus?
Anterior radius
True or False: The Semimembranosus is responsible for knee flexion and hip extension.
True
What is the action of the Internal Oblique muscle?
Rotates trunk, supports respiration
What is the origin of the Gracilis muscle?
Inferior pubic ramus
Fill in the blank: The _______ muscle flexes the thumb.
Flexor Pollicis Longus
