Test 3- Skeletal Muscle Flashcards
Superficial to frontal bone
Frontalis
Extends from cheekbones to corners of the mouth
Zygomaticus
What are the muscles of mastication/chewing?
Masseter
Temporalis
Muscles that move the head- anterolateral
Sternocleidomastoid
Scalenes
Muscles that move the head and extend the trunk- DEEP
Splenius Erector Spinae -Iliocostalis -Logissimus -Spinalis
Raises the eyebrows/wrinkles the brow
Frontalis
Raises lateral corners of the mouth when smiling
Zygomaticus
Elevates the mandible
Masseter
Elevates mandible
Temporalis
Flexes and/or laterally rotates the head
Sternocleidomastoid
Elevates first two ribs, flexes and rotates neck
Scalenes
Extends the head
Splenius
Extends and laterally flexes vertebral column
Iliocostalis
Extends ad laterally flexes vertebral column, extends and rotates the head
Longissimus
Extends vertebral column
Spinalis
Muscles of Respiration
External Intercostals
Internal Intercostals
Diaphragm
Elevates the rib cage for inspiration
External Intercostals
Depress rib cage for forced exhalation
Internal intercostals
Contracts to increase intra-abdominal pressure to force air into lungs
Diaphragm
Muscles of the abdominal wall
External oblique
Internal Oblique
Transversus abdominis
Rectus abdominis
Fibers run down toward the midline
External oblique
Fibers run up towards the midline
Internal Oblique
Fibers run across
Transversus abdominis
Fibers run up and down
Rectus abdominis
Flexes vertebral column, rotation is one side
External Oblique
Internal Oblique
Compresses the abdomen
Transversus abdominis
Flex and rotates lumbar abdominal region
Rectus abdominis
Muscles of the Anterior Thorax
Pectorals major
Serrates anterior
large chest muscle
pectoralis major
finger-like muscles
serratus anterior
protracts and rotates scapula downward
pectoralis major
rotates scapula upward
serratus anterior
Muscles of the posterior thorax
Trapezius
Levator Scapulae
Rhomboids
Broad back muscle
Trapezius
Elevates an adducts scapula
Levator scapulae
Stabilizes scapula
rhomboids (major and minor)
Stabilize, elevates, retracts and rotates scapula, extends head
Trapezius
Muscles crossing the shoulder that move the arm
pectorals major deltoid latissimus dorsi theres major subscapularis infraspinatus teres minor
Shoulder muscle
Deltoid
Abduction of arm
deltoid
Broad back muscle
Latissimus dorsi
Arm extension, also adduction and medial rotation of the arm
Latissimus dorsi
Extends, medially rotates and adduce the arm
teres major
Medially rotates arm
subscapularis (rotator cuff muscle)
Abducts arm
supraspinatus (rotator cuff muscle)
Laterally rotates arm
infraspinatus (rotator cuff muscle
Teres Minor
Muscles crossing the elbow joint that flex and extend the forearm
triceps brachii
biceps brachii
brachial
brachioradials
Posterior brachial region
triceps brachii
Forearm extensor
triceps brachii
Anterior brachial region
Biceps brachii
Brachialis
Brachioradials
Forearm flexor
Biceps brachii
Brachialis
Brachioradials
Muscles of the forearm- superficial anterior
Pronator teres Flexor carpi radialis Palmaris longus Flexor carpi ulnaris Flexor digitorum superficialis
Pronates forearm
pronator teres
flexor of hand
flexor carpi radialis
tenses skin and palmar fascia
palmaris longus
flexes and adducts hand
flexor carpi ulnaris
flexes hands and middle phalanges of fingers II-V
flexor digitorum superficialis
Muscles of the forearm- Deep Anterior
Flexor pollicis longus
Flexor digitorum profundus
Flexes distal phalanx of thumb
Flexor pollicis longus
Flexes distal interphalangeal joints
Flexor digitorum profundus
Muscles of the forearm- Superficial posterior
Brachioradialis Extensor carpi radialis longus Extensor carpi radialis brevis Extensor digitorum Extensor carpi ulnaris
Works with other muscles to extend and abduct the hand
Extensor carpi radialis longus
Extends and adducts hand
Extensor carpi radialis brevis
Extends the fingers
Extensor digitorum
Works with other muscles to extend and adduct hand
Extensor carpi ulnaris
Muscles of the forearm- Deep posterior
Supinator
Abductor pollicis longus
Extensor pollicis brevis and longus
Extendor indicis
Supinates arm
supinator
Abducts and extends thumb
Abductor pollicus longus
Extends thumb
Extensor pollicis brevis and longus
Extends index finger
Extendor indicis
Muscles crossing the hip and knee joint- anterior and medial muscles
Iliopsoas
-Iliacus
-Psoas major
Tensor fasciae latae
Thigh and trunk flexion
Iliacus
Thigh and trunk flexion, lateral flexion of vertebral column
Psoas major
Stabilizes trunk
Tensor fasciae latae
Muscles crossing the hip and knee joints that move the thigh and leg- anterior
Sartorius
Quadriceps femoris
Has four heads- all insert via single patellar tendon to the patella and tibial tuberosity and all extend the leg
Quadriceps femoris
- Rectus femoris
- Vastus lateralis
- Vastus medialis
- Vastus intermedius
Muscles crossing the hip and knee joints that move the thigh and leg-medial
Pectineus
Gracilis
Adductors
Adducts, flexes and medially rotates thigh
Pectineus
Adducts thigh, flexes, and medially rotates leg
Gracilis
Adducts and medially rotates thigh
Adductors
- brevis
- longus
- magnus
Muscles crossing the hip and knee joints that move the thigh and leg-posterior
Gluteus maximus Hamstrings -Biceps femoris -Semitendinosus -Semimembranosus
Extends the thigh
Gluteus maximus
Posterior muscles that originate from the ischial tuberosity and extend the thigh and flex the leg at the knee
Biceps femoris
Semitendinosus
Semimembranosus
Muscles of the lower leg that move the ankles and toes- Anterior
Tibialis Anterior
Extensor digitorum longus
Peroneus tertius
Extensor hallucis longus
Action: dorsiflexion
Tibialis anterior
Swelling of this muscle is commonly called shin splints
Tibialis anterior
Action: Toe extension
Extensor digitorum longus
Action: Dorsiflexion and eversion of the foot
Peroneus tertius
Action: extension of digit I
Extensor hallucis longus
Muscles of the leg that move the ankles and toes- lateral
Peroneus Longus
Peroneus Brevis
Action: Plantar flexion and eversion
Peroneus Longus
Peroneus Brevis
Muscles of the leg that move the ankles and toes- posterior superficial
Gastrocnemius
Soleus
Planters
Large calf muscle
Gastrocnemius
Deep to gastrocnemius
Soleus
Action: leg flexion and plantar flexion
Plantaris
Muscles of the leg that move the ankles and toes- posterior deep
Flexor digitorum longus
Flexor halluces longus
Tibialis posterior
Action: plantar flexes and inverts foot, flexes toes
Flexor digitorum longus
Action: Plantar flexes and inserts foot, flexes great toe
Flexor halluces longus
Action: Inverts foot
Tibialis posterior