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ANAT 411 MSK muscles
| Question | Answer |
|---|---|
| latissimus dorsi, trapezius, levator scapulae, rhomboid major, rhomboid minor | superficial muscles of the back |
| superficial muscle of the back; actions: extends, adducts, and medially rotates the humerus | latissimus dorsi |
| superficial muscle of the back; nerve: thoracodorsal n. | latissimus dorsi |
| superficial muscle of the back; actions: extends head, elevates and pulls shoulders posteriorly | trapezius |
| superficial muscle of the back; nerve: motor innervation CN XI (accessory n.) | trapezius |
| superficial muscle of the back; action: scapular elevation | levator scapulae |
| superficial muscle of the back; actions: rotation of scapula and rotation of glenoid cavity | rhomboid major |
| superficial muscles of the back (3); nerve: dorsal scapular n. | rhomboid major, levator scapulae, rhomboid minor |
| superficial muscle of the back; actions: retraction and elevation of the scapula | rhomboid minor |
| serratus posterior superior m., serratus posterior inferior m. | intermediate muscles of the back |
| intermediate muscle of the back; action: elevates the ribs during respiration | serratus posterior superior |
| intermediate muscles of the back (2); nerves: intercostal nerves | serratus posterior superior m., serratus posterior inferior |
| intermediate muscle of the back; location: deep to rhomboid major and minor, thin m. | serratus posterior superior |
| intermediate muscle of the back; action: depresses the ribs | serratus posterior inferior |
| erector spinae muscles (iliocostalis, longissimus, spinalis) | deep muscles of the back |
| deep muscles of the back; actions: unilaterally -> flexion of vertebral column laterally, bilaterally -> vertebral column and head extension, primary extensor of the back, contributes to stabilization of lateral rotation and flexion of vertebral column | erector spinae muscles |
| deep muscles of the back; nerves: dorsal rami of spinal nerves | erector spinae muscles |
| deltoid, serratus anterior, teres major, teres minor, supraspinatus, infraspinatus, subscapularis | muscles of the scapular region |
| muscle of scapular region; actions: flexion of the arm and rotates medially, abduction of the arm, extension and lateral rotation of arm | deltoid |
| muscles of scapular region (2); nerve: axillary n. | deltoid, teres minor |
| muscle of scapular region; attachment points: clavicle, acromion, spine of scapula; on top of shoulder | deltoid |
| muscle of scapular region; actions: protraction and rotation of the scapula, holds it against thoracic wall | serratus anterior |
| muscle of scapular region; nerve: long thoracic n. | serratus anterior |
| muscle of scapular region; location: inferior to armpit | serratus anterior |
| muscle of scapular region; actions: adducts and medially rotates humerus | teres major |
| muscle of scapular region; nerve: lower subscapular n. | teres major |
| muscle of scapular region; actions: external (lateral) rotation and adduction of the arm at the shoulder joint, stabilization of the glenoid cavity | teres minor |
| muscle of scapular region; actions: abduction initiation of arm to 15 degrees at glenohumeral joint | supraspinatus |
| muscles of scapular region (2); nerve: suprascapular n. | supraspinatus, infraspinatus |
| muscle of scapular region; actions: external (lateral) rotation of the arm at shoulder, stabilizes glenoid cavity | infraspinatus |
| muscle of scapular region; actions: medially rotates arm, stabilizes humeral head in glenoid cavity | subscapularis |
| muscle of scapular region; nerves: upper and lower subscapular nerves | subscapularis |
| subscapularis, infraspinatus, teres minor, supraspinatus | rotator cuff muslces |
| pectoralis major, pectoralis minor | muscles of the pectoral region |
| muscle of the pectoral region; actions: adducts and medially rotates humerus, draws scapula anteriorly and inferiorly | pectoralis major |
| muscle of the pectoral region; nerves: lateral and medial pectoral nerves | pectoralis major |
| muscle of the pectoral region; actions: draws scapula inferiorly and anteriorly against the thoracic wall, stabilizes scapula | pectoralis minor |
| muscle of the pectoral region; nerve: medial pectoral n. | pectoralis minor |
| compartment of the arm; flexors: biceps brachii, brachialis, and coracobrachialis muscles nerve: musculocutaneous n. | ant. compartment |
| compartment of the arm; extensors: triceps brachii nerve: radial n. | post. compartment |
| ant. compartment of the arm; 2 heads (long and short) | biceps brachii |
| post. compartment of the arm; 3 heads (lateral, long, medial) | triceps brachii |
| what muscle is pierced by the musculocutaneous n. | coracobrachialis |
| where is the common origin for the ant. (flexor) compartment of the forearm | medial epicondyle |
| where is the common origin for the post. (extensor) compartment of the forearm | lateral epicondyle |
| consists of superficial, deep, and immediate compartments | ant. compartment of the forearm |
| consists of superficial, deep, and outcropping compartments | post. compartment of the forearm |
| thenar, hypothenar, deep/short | intrinsic muscles of the hand |
| intrinsic muscle of the hand; action: opposition of the thumb | thenar muscles |
| intrinsic muscle of the hand; nerve: recurrent branch of median n. | thenar muscles |
| intrinsic muscle of the hand; action: opposition of pinky | hypothenar muscles |
| intrinsic muscles of the hand (2); nerve: ulnar n. | hypothenar muscles, deep/short muscles |
| intrinsic muscle of the hand; actions: abduction and adduction of phalanges | deep/short muscles |
| gluteus maximus, gluteus medius, gluteus minimus, piriformis | muscles of the gluteal region |
| muscle of gluteal region; actions: extends thigh and assists in lateral rotation | gluteus maximus |
| muscle of gluteal region; nerve: inferior gluteal n. | gluteus maximus |
| muscles of gluteal region; actions: abduct and medially rotate thigh | gluteus medius and minimus muscles |
| muscles of gluteal region; nerve: superior gluteal n. | gluteus medius and minimus muscles |
| muscle of gluteal region; actions: laterally rotate extended thigh and abduct flexed thigh | piriformis |
| muscle of gluteal region; nerves: branches of brachial plexus | piriformis |
| semitendinous, semimembranous, biceps femoris | hamstrings |
| post. compartment of thigh; actions: flexes leg and rotates it laterally when knee is flexed | biceps femoris short head |
| hamstring; nerve: common fibular division of sciatic n. | biceps femoris short head |
| proximal attachment to ischial tuberosity deep to gluteus maximus m., distal attachment to bones of the leg, innervation by the tibial division of the sciatic n. | common features of hamstrings |
| sartorius, quadriceps femoris muscles | anterior muscles of thigh |
| ant. muscle of thigh; actions: flexes, abducts, and laterally rotates thigh at hip joint and flexes leg at knee joint | sartorius |
| ant. muscle of thigh; nerve: femoral n. | sartorius |
| longest muscle in the body | sartorius |
| rectus femoris, vastus medialis, vastus lateralis, vastus intermedius | quadricep femoris muscles |
| ant. muscles of thigh; actions: extends leg at knee joint | quadricep femoris muscles |
| ant. muscle of thigh; nerve: femoral n. | quadricep femoris muscles |
| adductor magnus, gracilis | muscles of medial thigh |
| muscle of medial thigh; has adductor and hamstring portions | adductor magnus |
| action: extends thigh nerve: tibial part of sciatic n. | hamstring portion of adductor magnus |
| action: flexes thigh nerve: obturator n. | adductor portion of adductor magnus |
| muscle of medial thigh; actions: adducts thigh and flexes leg | gracilis |
| muscle of medial thigh; nerve: obturator n. | gracilis |
| extensor digitorum longus m., tibialis ant. m., fibularis tertius m., extensor hallucis longus m. | ant. compartment of leg |
| compartment of leg; actions: dorsiflexors of the ankle joint | ant. compartment |
| compartment of leg; nerve: deep fibular n. | ant. compartment |
| fibularis longus m., fibularis brevis m. | lat. compartment of leg |
| compartment of leg; actions: weak plantar flexion of ankle and eversion of ankle | lat. compartment |
| compartment of leg; nerve: superficial fibular n. | lat. compartment |
| gastrocnemius, soleus, plantaris, popliteus, tibialis post., flexor hallucis longus, flexor digitorum longus | post. compartment of leg |
| compartment of leg; actions: plantarflexion of ankle and flexion of knee | post. compartment |
| compartment of leg; nerve: tibial n. | post. compartment |
| musculature of foot; actions: extending the digits of the foot | dorsal musculature |
| musculature of foot; nerve: deep fibular n. | dorsal musculature |
| musculature of foot; actions: abduction, adduction, plantarflexion of digits | plantar musculature |
| musculature of foot; nerves: medial and lateral plantar n. | plantar musculature |
| where can premature splitting of the sciatic n. occur | inferior piriformis |
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emma.scarmon-coyotes
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