Questions and Answers
What is the function of the Flexor Carpi Ulnaris?
Which muscle is responsible for extending the fingers?
What is the role of the Biceps Brachii?
What does the Triceps Brachii do?
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What is the primary function of the Deltoid muscle?
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What is the function of the Trapezius muscle?
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What does the Erector Spinae muscle primarily do?
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Which muscle helps in lateral rotation of the arm?
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What is the function of the External Oblique?
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What defines the Rectus Abdominis muscle?
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What is the role of the Pectoralis Major?
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The internal oblique tenses the abdominal wall and extends the shoulder.
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What is the function of the Zygomaticus muscle?
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Which muscle is known as the 'kissing muscle'?
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What muscle is used to extend the hip while climbing stairs?
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What muscle group flexes the knee?
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Study Notes
Upper Limb Muscles
- Flexor Carpi Ulnaris: Wrist flexor located along the ulna.
- Extensor Digitorum: Muscle responsible for extending the fingers.
- Flexor Digitorum Superficialis: Muscle that flexes the fingers.
- Biceps Brachii: Facilitates elbow flexion (bending).
- Triceps Brachii: Muscle that extends the elbow.
Shoulder Muscles
- Deltoid: Powerful muscle for shoulder abduction and elevating the arm overhead.
- Trapezius: Muscle that enables shoulder shrugging and head extension.
- Latissimus Dorsi: Adducts the shoulder and helps extend the shoulder joint.
- Infraspinatus: Aids in lateral arm rotation.
- Teres Minor: Assists in lateral arm rotation, smaller muscle than infraspinatus.
Core Muscles
- External Oblique: Tenses abdominal wall and compresses abdominal contents; forms external sides of abdomen.
- Rectus Abdominis: Known as the "straight muscle" of the abdomen.
- Internal Oblique: Tenses abdominal wall; forms internal sides of abdomen.
- Transversus Abdominis: Compresses abdominal contents; runs horizontally through the abdominal cavity.
Respiratory Muscles
- External Intercostal: Muscles that help with inhalation by raising ribs.
- Internal Intercostal: Pulls ribs inward and downward, facilitating exhalation.
- Diaphragm: Major muscle involved in inhalation.
Facial and Jaw Muscles
- Zygomaticus: Muscle used for smiling.
- Buccinator: Helps manipulate food and allows sucking in of cheeks.
- Orbicularis Oculi: Muscle responsible for winking.
- Frontalis: Forms horizontal frown creases in the forehead.
- Orbicularis Oris: Known as the "kissing muscle."
- Masseter: Prime mover for jaw closure.
- Temporalis: Synergist in jaw closure.
Neck and Hip Muscles
- Sternocleidomastoid: Prominent in head flexion; has two origins.
- Iliopsoas: Hip flexor made of two muscles, located deep in the pelvis.
Lower Limb Muscles
- Gluteus Maximus: Engaged during hip extension, particularly in climbing stairs.
- Gastrocnemius: Known as the "toe dancer's" muscle; a two-bellied calf muscle.
- Tibialis Anterior: Responsible for foot inversion and dorsiflexion.
- Adductors: Muscle group draws legs to the midline—important for standing at attention.
- Quadriceps: Muscle group that extends the knee.
- Hamstrings: Muscle group involved in thigh extension and knee flexion.
- Peroneus Longus: Muscle group that plantar flexes and everts the foot.
- Sartorius: A weak thigh flexor known as the "tailor's muscle," recognized for its strap-like structure.
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Description
Test your knowledge of the muscles and their functions with these flashcards. Each card provides the name of a muscle along with its specific function, such as flexing or extending limbs. Perfect for students studying anatomy or physiology.
