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Questions and Answers
Which muscle is primarily responsible for elevating the scapula?
Which muscle is primarily responsible for elevating the scapula?
What is the distal attachment of the Latissimus Dorsi muscle?
What is the distal attachment of the Latissimus Dorsi muscle?
Which nerves are responsible for the innervation of the Trapezius muscle?
Which nerves are responsible for the innervation of the Trapezius muscle?
What action does the descending part of the Trapezius muscle perform?
What action does the descending part of the Trapezius muscle perform?
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Which muscle acts to adduct and medially rotate the humerus?
Which muscle acts to adduct and medially rotate the humerus?
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Which of the following muscles acts to rotate the glenoid cavity superiorly?
Which of the following muscles acts to rotate the glenoid cavity superiorly?
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What is the primary role of the Rhomboid Minor?
What is the primary role of the Rhomboid Minor?
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Which of the following is NOT a proximal attachment site for the Trapezius muscle?
Which of the following is NOT a proximal attachment site for the Trapezius muscle?
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What is the primary action of the Flexor Carpi Radialis (FCR)?
What is the primary action of the Flexor Carpi Radialis (FCR)?
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Which nerve innervates the Palmaris Longus?
Which nerve innervates the Palmaris Longus?
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What is the distal attachment of the Flexor Carpi Ulnaris?
What is the distal attachment of the Flexor Carpi Ulnaris?
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Which muscle primarily flexes the distal phalanges of the 4th and 5th digits?
Which muscle primarily flexes the distal phalanges of the 4th and 5th digits?
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What action does the Flexor Digitorum Superficialis perform primarily?
What action does the Flexor Digitorum Superficialis perform primarily?
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What is the innervation of the Flexor Pollicis Longus?
What is the innervation of the Flexor Pollicis Longus?
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Which muscle is responsible for flexing the hand and tensing the palmar aponeurosis?
Which muscle is responsible for flexing the hand and tensing the palmar aponeurosis?
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Which layer does the Flexor Digitorum Profundus belong to?
Which layer does the Flexor Digitorum Profundus belong to?
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What is the primary action of the rhomboid muscles?
What is the primary action of the rhomboid muscles?
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Which nerve innervates the supraspinatus muscle?
Which nerve innervates the supraspinatus muscle?
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What muscle initiates abduction of the arm?
What muscle initiates abduction of the arm?
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Which of the following muscles does not laterally rotate the arm?
Which of the following muscles does not laterally rotate the arm?
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What is the innervation of the biceps brachii muscle?
What is the innervation of the biceps brachii muscle?
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Where does the triceps brachii have its proximal attachment?
Where does the triceps brachii have its proximal attachment?
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Which muscle's primary action is to supinate the forearm?
Which muscle's primary action is to supinate the forearm?
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What is the function of the coracobrachialis muscle?
What is the function of the coracobrachialis muscle?
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Which muscle is primarily responsible for pronating the forearm?
Which muscle is primarily responsible for pronating the forearm?
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What is the primary action of the Pronator Quadratus muscle?
What is the primary action of the Pronator Quadratus muscle?
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Which muscle has its distal attachment at the base of the 1st metacarpal?
Which muscle has its distal attachment at the base of the 1st metacarpal?
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What nerve innervates the Extensor Pollicis Longus?
What nerve innervates the Extensor Pollicis Longus?
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Which of the following muscles is responsible for extending the distal phalanx of the thumb?
Which of the following muscles is responsible for extending the distal phalanx of the thumb?
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Which muscle is located in the superficial layer of the posterior compartment?
Which muscle is located in the superficial layer of the posterior compartment?
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The Extensor Carpi Radialis Longus primarily acts to do what at the wrist joint?
The Extensor Carpi Radialis Longus primarily acts to do what at the wrist joint?
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What muscle action is performed by the Extensor Pollicis Brevis?
What muscle action is performed by the Extensor Pollicis Brevis?
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Which muscle's action is maximal when the forearm is in a midpronated position?
Which muscle's action is maximal when the forearm is in a midpronated position?
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What is the distal attachment of the Extensor Carpi Radialis Brevis (ECRB)?
What is the distal attachment of the Extensor Carpi Radialis Brevis (ECRB)?
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Which nerve innervates the Extensor Digiti Minimi (EDM)?
Which nerve innervates the Extensor Digiti Minimi (EDM)?
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What is the primary muscle action of the Extensor Digitorum?
What is the primary muscle action of the Extensor Digitorum?
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What is the proximal attachment of the Extensor Carpi Ulnaris (ECU)?
What is the proximal attachment of the Extensor Carpi Ulnaris (ECU)?
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Which muscle primarily extends the 5th digit at the metacarpophalangeal joint?
Which muscle primarily extends the 5th digit at the metacarpophalangeal joint?
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What action is performed by the Extensor Carpi Ulnaris (ECU) at the wrist joint?
What action is performed by the Extensor Carpi Ulnaris (ECU) at the wrist joint?
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Which muscle is responsible for extending the 2nd digit and aiding in hand extension at the wrist?
Which muscle is responsible for extending the 2nd digit and aiding in hand extension at the wrist?
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Which of the following muscles does NOT have its proximal attachment on the lateral epicondyle of the humerus?
Which of the following muscles does NOT have its proximal attachment on the lateral epicondyle of the humerus?
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What is the primary muscle action of the Extensor Indicis?
What is the primary muscle action of the Extensor Indicis?
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Which nerve innervates the Opponens Pollicis?
Which nerve innervates the Opponens Pollicis?
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What muscle action is associated with the Abductors Pollicis Brevis?
What muscle action is associated with the Abductors Pollicis Brevis?
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Where is the proximal attachment of the Flexor Digiti Minimi Brevis located?
Where is the proximal attachment of the Flexor Digiti Minimi Brevis located?
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Which muscle assists in the opposition of the 5th digit?
Which muscle assists in the opposition of the 5th digit?
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What is the distal attachment site of the Extensor Indicis?
What is the distal attachment site of the Extensor Indicis?
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What action does the Flexor Pollicis Brevis perform?
What action does the Flexor Pollicis Brevis perform?
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Which muscle has its proximal attachment at the posterior surface of the distal third of the ulna?
Which muscle has its proximal attachment at the posterior surface of the distal third of the ulna?
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What forms the posterior boundary of the cubital fossa?
What forms the posterior boundary of the cubital fossa?
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Which structure lies anterior to the brachial artery within the cubital fossa?
Which structure lies anterior to the brachial artery within the cubital fossa?
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Which muscle primarily contributes to the medial boundary of the cubital fossa?
Which muscle primarily contributes to the medial boundary of the cubital fossa?
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What forms the floor of the cubital fossa?
What forms the floor of the cubital fossa?
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Which artery is primarily located at the cubital fossa?
Which artery is primarily located at the cubital fossa?
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Study Notes
Table 1-6: Close-Packed Positions of Joints
- Zygapophyseal (spine): Extension
- Temporomandibular: Teeth clenched
- Glenohumeral: Abduction and external rotation
- Acromioclavicular: Arm abducted to 90 degrees
- Sternoclavicular: Arm resting by side
- Ulnohumeral: Elbow flexed 90 degrees, forearm supinated 5 degrees
- Radiohumeral: Extension
- Proximal radioulnar: 5 degrees of supination
- Distal radioulnar: 5 degrees of supination
- Radiocarpal (wrist): Extension with radial deviation
- Metacarpophalangeal: Full flexion
- Carpometacarpal: Full opposition
- Interphalangeal: Full extension
- Hip: Full extension, internal rotation, and abduction
- Talocrural (ankle): Maximum dorsiflexion
- Subtalar: Supination
- Midtarsal: Supination
- Tarsometatarsal: Supination
- Metatarsophalangeal: Full extension
- Interphalangeal: Full extension
Table 1-7: Open-Packed (Resting) Positions of Joints
- Zygapophyseal (spine): Midway between flexion and extension
- Temporomandibular: Mouth slightly open (freeway space)
- Glenohumeral: 55 degrees of abduction, 30 degrees of horizontal adduction
- Acromioclavicular: Arm resting by side
- Sternoclavicular: Arm resting by side
- Ulnohumeral: 70 degrees of flexion, 10 degrees of supination
- Radiohumeral: Arm resting by side (description, not degrees)
- Proximal radioulnar: 70 degrees of flexion, 35 degrees of supination
- Distal radioulnar: 10 degrees of supination
- Radiocarpal (wrist): Neutral with slight ulnar deviation
- Carpometacarpal: Midway between abduction-adduction and flexion-extension
- Metacarpophalangeal: Slight flexion
- Interphalangeal: Slight flexion
- Hip: 10-30 degrees of flexion, 10-30 degrees of abduction, and 0-5 degrees of external rotation
- Talocrural (ankle): 25 degrees of flexion, 10 degrees of plantar flexion, midway between maximum inversion and eversion
- Subtalar: Midway between extremes of range of movement
- Midtarsal: Midway between extremes of range of movement
- Tarsometatarsal: Midway between extremes of range of movement
- Metatarsophalangeal: Neutral
- Interphalangeal: Slight flexion
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Description
Explore the close-packed and open-packed positions of various joints in the human body. This quiz will test your knowledge on specific positions, movements, and their anatomical relevance. Perfect for students and professionals studying kinesiology or anatomy.
