Podcast
Questions and Answers
The ______ abductor also helps in the rotation of the arm.
The ______ abductor also helps in the rotation of the arm.
deltoid
The ______ brachii is known for its role in extending the arm.
The ______ brachii is known for its role in extending the arm.
triceps
The ______ major assists in the adduction and rotation of the humerus.
The ______ major assists in the adduction and rotation of the humerus.
pectoralis
The ______ maximus is a powerful muscle responsible for extending the hip.
The ______ maximus is a powerful muscle responsible for extending the hip.
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The ______ anterior helps elevate the ribs during respiration.
The ______ anterior helps elevate the ribs during respiration.
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Which muscle is primarily responsible for flexing the leg?
Which muscle is primarily responsible for flexing the leg?
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What is the primary action of the gastrocnemius muscle?
What is the primary action of the gastrocnemius muscle?
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Which muscle assists with flexion and outward rotation of the forearm?
Which muscle assists with flexion and outward rotation of the forearm?
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Which muscle is specifically known for abducting the thigh?
Which muscle is specifically known for abducting the thigh?
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What is the primary role of the sternocleidomastoid muscle?
What is the primary role of the sternocleidomastoid muscle?
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Study Notes
Muscles and their Actions
- Trapezius: Draws scapula dorsally and anterior, elevates, depresses, and retracts the scapula.
- Deltoid: Abducts the arm.
- Latissimus dorsi: Pulls the forelimb dorsad and caudad.
- Teres major: Rotates and flexes the arm.
- Teres minor: Assists the infraspinatus.
- Triceps brachii: Extends the arm.
- Biceps brachii: Flexor of the arm, flexes the forearm and rotates it outward
- Brachioradialis: Flexor of the forearm, flexes the forearm at the elbow
- Gluteus medius: Abducts the thigh.
- Gluteus maximus: Abducts the thigh.
- Vastus lateralis: Extensor of the leg.
- Biceps femoris: Adducts the thigh and flexes the leg.
- Semitendinosus: Flexor of the leg.
- Gastrocnemius: Extends the foot.
- Peroneus longus: Extends and flexes the foot, plantar flexion and eversion of the foot.
- Frontalis: Elevates the eyebrows.
- Temporalis: Elevates the mandible and moves it side to side.
- Orbicularis oculi: Closes the eyelids.
- Masseter: Levator of the lower jaw.
- Sternocleidomastoid: Flexes the neck and helps move the head.
- Pectoralis major: Adducts and rotates the humerus, adductor and rotator of the humerus
- Serratus anterior: Elevates the ribs in assisting with respiration.
- Extensor carpi: Extends the hand.
- Flexor carpi: Flexes the wrist and assists in abduction of the hand and wrist.
- External oblique: Ipsilateral flexion of the trunk, contralateral rotation of the trunk, compresses the abdomen.
- Rectus abdominis: Retracts the ribs and sternum, compresses the abdomen.
- Sartorius: Hip flexion, abducts and rotates the thigh laterally.
- Adductor muscles: Adducts the thigh.
- Quadriceps femoris: Extends the leg and flexes the thigh.
- Tibialis anterior: Dorsiflexion of the foot.
- Soleus: Plantar flexor.
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Description
Test your knowledge on the functions of various muscles in the human body. This quiz covers the actions of major muscle groups such as the trapezius, deltoid, and gluteus maximus, among others. Discover how each muscle contributes to movement and stability during physical activities.
