ACTIVITY 2

PALAD, Carina Therese - ACTIVITY 2

PALAD, Carina Therese - ACTIVITY 2

by Carina Therese Palad -
Number of replies: 0

Name at least three muscles that actively contracts during the following activities and name its action and innervation:

 

  1. TURNING A DOOR KNOB

  • Supinator

  1. ACTION -  Proximal radioulnar joint: Forearm supination

  2. INNERVATION - Posterior interosseous nerve (C7, C8)

  • Pronator teres

  1. ACTION - Pronation of forearm at the proximal radioulnar joint, flexion of the forearm at the elbow joint

  2. INNERVATION - Median nerve (C6, C7)

  • Pronator quadratus muscles

  1. ACTION - Proximal radioulnar joint: Forearm pronation

  2. INNERVATION - Median nerve (anterior interosseous nerve, C7, C8)

 

  1. THROWING A BASEBALL OVERHEAD

  • Subscapularis

  1. ACTION - Arm internal rotation, Stabilizes humeral head in glenoid cavity

  2. INNERVATION - Upper and lower subscapular nerves (C5 - C6)

  • Teres major

  1. ACTION - extends arm at shoulder and joint, assists in adduction and medial rotation of arm at shoulder joint

  2. INNERVATION - Lower subscapular nerve (C5-C7)

  • Deltoid 

  1. ACTION - anterior fibers flex and medially rotate arm at shoulder point, posterior fibers extend and laterally rotate arm at shoulder point, lateral fibers abduct arm at shoulder point

  2. INNERVATION - Axillary nerve (C5, C6)

 

  1. KICKING A BALL

  • Iliopsoas

  1. ACTION - flex thigh at hip point, rotate thigh laterally, flex trunk on hips as in sitting up from supine position

  2. INNERVATION - Iliacus: femoral nerve (L2-L4); Psoas major: anterior rami of spinal nerves (L1-L3)

  • Semitendinosus

  1. ACTION - Hip joint: Thigh extension, thigh internal rotation, stabilizes pelvis.; Knee joint: Leg flexion, leg internal rotation.

  2. INNERVATION - Tibial division of sciatic nerve (L5-S2)

  • Quadriceps femoris

  1. ACTION - Hip joint: Thigh flexion; Knee joint: Leg extension

  2. INNERVATION - Femoral nerve (L2-L4)

 

  1. DOING SIT-UPS

  • Rectus abdominis

  1. ACTION - move the body between the ribcage and the pelvis

  2. INNERVATION - Intercostal nerves (T7-T11), subcostal nerve (T12)

  • Transversus abdominis

  1. ACTION - Bilateral contraction - Compresses abdominal viscera, expiration; Unilateral contraction - Trunk rotation (ipsilateral)

  2. INNERVATION - Intercostal nerves (T7-T11), subcostal nerve (T12), iliohypogastric nerve (L1), ilioinguinal nerve (L1)

  • Internal oblique 

  1. ACTION - Bilateral contraction - Trunk flexion, compresses abdominal viscera, expiration; Unilateral contraction - Trunk lateral flexion (ipsilateral), trunk rotation (ipsilateral)

  2. INNERVATION - Intercostal nerves (T7-T11), subcostal nerve (T12), iliohypogastric nerve (L1), ilioinguinal nerve (L1)

 

  1. WALKING

  • Soleus

  1. ACTION - plantar flexion of the foot at the ankle

  2. INNERVATION - Tibial nerve (S1, S2)

  • Fibularis longus

  1. ACTION - Talocrural joint: Foot plantar flexion; Subtalar joint: Foot eversion; Supports longitudinal and transverse arches of foot

  2. INNERVATION - Superficial fibular nerve (L5, S1)

  • Tibialis anterior

  1. ACTION - Talocrural joint: foot dorsiflexion; subtalar joint: foot inversion

  2. INNERVATION - Deep fibular nerve (L4, L5)

 

  1. BREATHING

  • Diaphragm 

  1. ACTION - inhalation: contraction causes flattening and increasing the vertical dimension of thoracic cavity; exhalation: relaxation causes superior moving and decreasing of the vertical dimension of thoracic cavity

  2. INNERVATION - Phrenic nerves (C3-C5) (sensory innervation of peripheries via 6th-11th intercostal nerves)

  • Internal intercostal muscles

  1. ACTION - Depress ribs during forced expiration; Support intercostal spaces and thoracic cage

  2. INNERVATION - Intercostal nerves

  • External intercostal muscles

  1. ACTION - Elevate ribs during forced inspiration; Supports intercostal spaces and thoracic cage

  2. INNERVATION - Intercostal nerves