Lab 7 Muscles Flashcards
Frontails
Origin: cranial aponeurosis
Insertion: skin of eyebrow
Function: raise eyebrows
Orbicularis oris
Origin: muscle surrounding mouth
Insertion: skin and muscle around mouth
Function: closes the protrudes and lips
Zygomaticus major
Origin: zygomatic bone
Insertion: skin and muscle at upper corner of lips
Function: raises the corner of mouth (smile)
Masseter
Origin: zygomatic arch
Insertion: mandible
Function: closes mouth (elevates mandible)
Temporalis
Origin: temporal bone
Insertion: mandible
Function: closes the mouth (elevates mandible)
Sternocleidomastoid
Origin: sternum, clavicle
Insertion: temporal bone
Function:flexes neck, rotates head
External intercostals
Origin: superior rib
Insertion: inferior rib
Function: elevates the ribs, assists inspiration
Internal intercostals
Origin: inferior rib
Insertion: superior rib
Function: depresses the ribs, assists expiration
Diaphragm
Origin: xiphoid, costal cartilage,lumbar vertebrae
Insertion: central tendon
Function: inspiration
Recuts abdominis
Origin: pubis
Insertion: costal cartilages of ribs 5-7
Function: flexes the vertebral column (torso)
External oblique
Origin: lower 8 ribs
Insertion: iliac crest
Function: flexes and rotates the torso
Transversus abdominis
Origin: costal cartilage of ribs 7-12, iliac crest, lumbodorsal fascia
Insertion: linea alba, pubis
Function: compresses the abdomen
Trapezius
Origin: occipital bone
Insertion: clavicle, scapula
Function: extends and rotates neck, elevates shoulder girdle
Pectoralis major
Origin: clavicle, sternum, cartilage of ribs 2-6
Insertion: humerus
Function: flexes, adducts and rotates the shoulder
Pectoralis major
Origin: clavicle, sternum, cartilage of ribs 2-6
Insertion: humerus
Function: flexes, adducts and rotates the shoulder
Latissimus dorsi
Origin: spines of lower thoracic vertebrae, lumbar vertebrae
Insertion: humerus
Function: extends, adducts and rotates the shoulder
Deltoid
Origin: clavicle, scapula
Insertion: humerus
Function: abducts and rotates the shoulder
Biceps brachii
Origin: scapula
Insertion: radius
Function: flexes the shoulder and elbow, supinates the forearm
Brachialis
Origin: humerus
Insertion: ulna
Function: flexes the elbow
Brachioradialis
Origin: humerus
Insertion: radius
Function: flexes the elbow
Triceps brachii
Origin: scapula and posterior humerus
Insertion: olecranon process of ulna
Function: extends shoulder and elbow
Gluteus maximus
Origin: posterior sacrum and ilium
Insertion: femur and iliotibial band
Function: extends and rotates hip
Gluteus medius
Origin: ilium
Insertion: femur
Function: abducts nd rotates hip, keeps pelvic level in gait
Gluteus minimus
Origin: ilium
Insertion: femur
Function: abducts and rotates hip
Rectus femoirs
Origin: ilium, femur
Insertion: tibia via patella
Function: extends knee, flexes hip
Vastus lateralis
Origin: ilium, femur
Insertion: tibia via patella
Function: extends knee
Vactus medialis
Origin: ilium, femur
Insertion: tibia via patella
Function: extends the knee
Sartorius
Origin: ilium
Insertion: tibia
Function: flexes, abducts and rotates hip + flexes knee
Biceps femoris
Origin: ischium, femur
Insertion: tibia, fibula
Function: flexes knee, extends hip
Semitendinosus
Origin: ischium, femur
Insertion: tibia, fibula
Function: flexes knee, extends hip
Semimembranosus
Origin: ischium, femur
Insertion: tibia, fibula
Function: flexes knee, extends hip
Tibialis anterior
Origin: anterior tibia
Insertion: medial cuneiform, 1st metatarsal
Function: flexes ankle and inverts foot
Fibularis longus
Origin: lateral fibula
Insertion: medial cuneiform, 1st metatarsal Function
Function: flexes ankle, everts foot
Gastrocnemius
Origin: femur
Insertion: calcaneus by Achilles tendon
Function: flexes ankle and knee
Soleus
Origin: posterior tibia and fibula
Insertion: calcaneus by Achilles tendon
Function: flexes ankle
