Anatomy Muscle Tables and Nacho Event Sign-Up Review

Comprehensive vocabulary flashcards covering anatomical muscle attachments, actions, and innervations, as well as details from the Nacho Sign-Up document.

Digastric muscle

A neck muscle whose anterior belly depresses the mandible and elevates the hyoid bone (innervated by CN $V_3$), and whose posterior belly elevates and retracts the hyoid bone (innervated by facial nerve CN VII).

Omohyoid muscle

A muscle attached proximally to the superior border of the scapula and distally to the hyoid bone via a fascia sling; it depresses the hyoid bone and fixes it during mouth opening.

Sternocleidomastoid

A muscle attached proximally to the manubrium of the sternum and medial end of the clavicle, and distally to the mastoid process of the temporal bone; innervated by CN XI (accessory nerve).

Subscapularis

A muscle attached proximally to the subscapular fossa of the scapula and distally to the lesser tubercle of the humerus; it medially rotates and adducts the arm, innervated by upper and lower subscapular nerves ($C5-C6$).

Supraspinatus

A muscle attaching to the supraspinous fossa of the scapula and greater tubercle of the humerus that abducts the arm; innervated by the suprascapular nerve ($C5-C6$).

Infraspinatus

An agonist muscle for lateral rotation of the arm that attaches to the infraspinous fossa of the scapula and greater tubercle of the humerus; innervated by the suprascapular nerve ($C5-C6$).

Teres minor

A muscle attaching to the superoposterior lateral border of the scapula and greater tubercle of the humerus that laterally rotates and adducts the arm; innervated by the axillary nerve ($C5-C6$).

Teres major

A muscle attaching to the inferior lateral border and inferior angle of the scapula and intertubercular groove of the humerus; extends, adducts, and medially rotates the arm.

Deltoid

A muscle attached proximally to the acromial end of the clavicle, acromion, and spine of the scapula, inserting at the deltoid tuberosity; anterior fibers flex/rotate medially, middle fibers act as agonist of arm abduction, and posterior fibers extend/rotate laterally.

Biceps brachii

A muscle with long (supraglenoid tubercle) and short (coracoid process) heads that inserts into the radial tuberosity and bicipital aponeurosis; flexes and supinates the forearm.

Brachialis

A muscle attached proximally to the distal anterior surface of the humerus and distally to the tuberosity and coronoid process of the ulna; functions as an agonist of forearm flexion.

Coracobrachialis

A muscle attaching to the coracoid process of the scapula and middle medial shaft of the humerus that adducts and flexes the arm; innervated by the musculocutaneous nerve ($C5-C6$ fibers).

Triceps brachii

A three-headed muscle (long, lateral, medial) inserting on the olecranon of the ulna that extends the forearm; innervated by the radial nerve ($C5-C7$ fibers).

Brachioradialis

A muscle originating at the lateral supracondylar ridge of the humerus and inserting at the styloid process of the radius; flexes the forearm.

Dorsal interosseous (hand)

Muscles originating on adjacent, opposing surfaces of metacarpals and inserting on dorsal tendons of fingers 2-5; abduct fingers 2-5, flex MP joints, and extend PIP/DIP joints; innervated by the ulnar nerve ($C8-T1$).

Opponens pollicis

A muscle attached proximally to the flexor retinaculum and trapezium, inserting on the lateral side of metacarpal I; performs opposition of the thumb.

Gluteus maximus

A gluteal muscle originating from the iliac crest, sacrum, and coccyx, inserting on the iliotibial tract of fascia lata and gluteal tuberosity of the femur; abducts and laterally rotates the thigh; innervated by the inferior gluteal nerve ($L5-S2$).

Gluteus medius

A gluteal muscle originating on the posterior ilium between anterior and posterior gluteal lines, inserting on the greater trochanter of the femur; abducts and medially rotates the thigh; innervated by the superior gluteal nerve ($L4-S1$).

Piriformis

A muscle originating on the anterolateral surface of the sacrum and inserting on the greater trochanter of the femur; laterally rotates the thigh; innervated by the nerve of piriformis ($S1-S2$).

Gemellus superior

A muscle originating on the ischial spine and inserting on the obturator internus tendon; laterally rotates the thigh.

Obturator internus

A muscle originating on the posterior surface of the obturator membrane and margins of obturator foramen, inserting on the greater trochanter; laterally rotates the thigh.

Quadratus femoris

A muscle originating on the lateral border of the ischial tuberosity and inserting on the intertrochanteric crest of the femur; laterally rotates the thigh.

Tensor fasciae latae

A muscle attached proximally to the anterior superior iliac spine and distally to the iliotibial band; flexes, lifts forward, and abducts the thigh outward; supplied by the superior gluteal nerve.

Rectus femoris

A quad muscle originating at the anterior inferior iliac spine and inserting at the tibial tuberosity via the quadriceps tendon/patellar ligament; flexes thigh and extends leg at knee joint.

Sartorius

A muscle originating at the anterior superior iliac spine and inserting at the medial side of the tibial tuberosity; flexes thigh, laterally rotates thigh, and flexes leg at knee joint.

Iliopsoas

A muscle group composed of psoas major, psoas minor, and iliacus attaching to the lumbar spine and inserting at the lesser trochanter; performs hip flexion.

Adductor longus

A muscle attached proximally to the pubis near the pubic symphysis and distally to the linea aspera of the femur; adducts and flexes the thigh; innervated by the obturator nerve ($L2-L4$).

Gracilis

A muscle attached proximally to the inferior ramus and body of the pubis and distally to the upper medial surface of the tibia; adducts thigh, flexes thigh, and flexes leg at knee joint.

Semimembranosus

A hamstring muscle attached proximally to the ischial tuberosity and distally to the posterior surface of the medial condyle of the tibia; extends thigh, flexes leg at knee joint, and medially rotates leg when flexed.

Semitendinosus

A hamstring muscle attached proximally to the ischial tuberosity and distally to the proximal medial surface of the tibia; extends thigh, flexes knee joint, and medially rotates leg when flexed.

Biceps femoris

A hamstring muscle with a long head (ischial tuberosity) and short head (linea aspera of femur) inserting on the head of the fibula; extends thigh (long head) and flexes leg at knee joint (both heads).

Tibialis anterior

A leg muscle attached proximally to the lateral condyle and proximal shaft of tibia, and distally to metatarsal I and first (medial) cuneiform; dorsiflexes and inverts foot; innervated by deep fibular nerve ($L4-S1$).

Peroneus longus (fibularis longus)

A leg muscle originating at the head and lateral surface of the fibula and inserting on metatarsal I and medial cuneiform after crossing the plantar aspect of the foot; performs plantar flexion and eversion.

Gastrocnemius

A calf muscle attached proximally to the superior posterior surface of the lateral and medial condyles of the femur and distally to the calcaneus via the calcaneal tendon; flexes leg at knee joint and plantar flexes foot.

Soleus

A calf muscle attached proximally to the head/proximal shaft of fibula and medial border of tibia, inserting on the calcaneus via the calcaneal tendon; plantar flexes the foot.

Popliteus

A muscle attached proximally to the lateral condyle of the femur and distally to the posterior proximal surface of the tibia; flexes leg at knee joint and medially rotates tibia to unlock the knee.

Nacho Sign-Up Sheet

A sign-up sheet for Thursday, October 1st, where participants sign up next to specific food items or supplies to contribute to a nacho event.

Nacho Cheese Contribution

An item on the Nacho Sign-Up sheet specifying 1 gallon total, which was signed up for by Armando.

Plates / Napkins / Cups Contribution

An item requirement of 20 - 25 on the sign-up sheet, covered by Vevis (plates), Jaspreet Kaur (napkins), and Lina (cups).

Drinks Contribution

An item requirement of 20-25 servings on the sign-up sheet, covered by Netty (Coke) and Norma (Diet Pepsi).

Flexor hallucis longus

A muscle originating on the posterior medial surface of the tibia and inserting on the distal phalanx of the great toe; plantar flexes foot and flexes MP, IP, and DIP joints of toe 1.

Extensor hallucis longus

A muscle attached proximally to the anterior surface of the fibula and interosseous membrane, inserting on the distal phalanx of toe 1; extends the great toe (toe 1) and dorsiflexes foot.

Extensor digitorum brevis

An intrinsic foot muscle originating on the calcaneus and inferior extensor retinaculum, inserting on the middle phalanges of toes 2-4; extends MP, PIP, and DIP joints of toes 2-4.

Flexor digitorum brevis

An intrinsic foot muscle attached proximally to the calcaneus and distally to middle phalanges of toes 2-5; flexes MP and PIP joints of toes 2-5; innervated by medial plantar nerve ($S2-S3$).

Adductor hallucis

A foot muscle with transverse head (capsules of MP joints II-V) and oblique head (bases of metatarsals II-IV) inserting on the lateral side of the proximal phalanx of the great toe; adducts the great toe (toe 1).