Questions and Answers
What is the muscle used in smiling?
zygomatic major
What is the muscle used to suck in cheeks?
buccinator
What muscle is used in blinking or squinting?
orbicularis oculi
Which muscle is used for kissing?
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What is the prime mover of jaw closure?
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What muscle is used to form the horizontal frown crease on the forehead?
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What is the synergist muscle for jaw closure?
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What is the prime mover of head flexion and a two-headed muscle?
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Which muscle is used to rotate the scapula?
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What is the hip flexor deep in the pelvis that is a composite of two muscles?
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What muscle is used to extend the hip when climbing stairs?
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Which muscle is known as the 'toe dancer's' muscle and is a two-bellied muscle of the calf?
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What muscle inverts and dorsiflexes the foot?
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Which muscle group allows you to draw your legs to the midline of your body?
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What muscle group extends the knee?
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What muscle group extends the thigh and flexes the knee?
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What smaller hip muscle is commonly used as an injection site?
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Which muscle group of the lateral leg plantar flexes and everts the foot?
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What is the strap-like muscle that is a weak thigh flexor known as the 'tailor's muscle'?
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What muscle is a plantar flexor similar to the two-bellied muscle that lies over it?
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Study Notes
Facial Muscles
- Zygomatic Major: Used primarily for smiling, elevates the corners of the mouth.
- Buccinator: Compresses the cheeks inward, essential for actions like sucking in the cheeks.
- Orbicularis Oculi: Responsible for blinking and squinting, encircles the eye.
- Orbicularis Oris: Key muscle for kissing, encircles the mouth.
Jaw and Head Muscles
- Masseter: Main muscle for jaw closure, crucial for chewing.
- Temporalis: Acts as a synergist for the masseter, assists in jaw closure.
- Sternocleidomastoid: Two-headed muscle that flexes the neck and rotates the head, vital for head movement.
Shoulder and Hip Muscles
- Trapezius: Responsible for scapula rotation and shoulder elevation.
- Iliopsoas: Composed of two muscles; major hip flexor located deep in the pelvis.
- Gluteus Maximus: Extends the hip, particularly active when climbing stairs.
Leg and Calf Muscles
- Gastrocnemius: Known as the "toe dancer's" muscle, has two bellies in the calf, contributes to plantar flexion.
- Tibialis Anterior: Inverts and dorsiflexes the foot, important for walking and balance.
Thigh and Leg Muscle Groups
- Adductors: Group of muscles that draw legs towards the midline, essential for posture.
- Quadriceps: Muscle group that extends the knee, involved in walking and running.
- Hamstrings: Muscle group that extends the thigh and flexes the knee, plays a role in activities like running.
Smaller and Accessory Muscles
- Gluteus Medius: Smaller hip muscle often used as an injection site, stabilizes the pelvis.
- Fibularis Muscles: Lateral leg muscles that evert and plantar flex the foot, contribute to balance.
- Sartorius: Strap-like muscle known as the "tailor's muscle," assists in thigh flexion and lateral rotation.
- Soleus: Plantar flexor muscle located beneath the gastrocnemius, aids in standing and walking stability.
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Description
Explore the essential muscles involved in facial expressions with these flashcards. From smiling to kissing and blinking, each card defines a key muscle and its function. Perfect for students of anatomy looking to strengthen their understanding of facial musculature.
