Lab Tuesday April USE THIS FOR THURSDAY

  • Muscle Actions Overview

    • Importance of understanding muscle actions in foot and fractures.

    • PowerPoint presentation with animations/videos to illustrate muscle movements.

  • Definitions of Movements

    • Abduction: Movement away from the midline.

    • Example: Deltoid muscle highlights this action.

    • Adduction: Movement towards the midline.

  • Key Muscles and Their Functions

    • Diaphragm:

    • Prime mover of inspiration; allows inhalation by expanding thoracic cavity.

    • Compresses abdominopelvic cavity during inhalation.

    • Pectoralis Minor🇦

    • Deeper muscle to pectoralis major.

    • Functions include drawing scapula forward/downward and rib cage elevation.

    • Pectoralis major

    • draws scapula forward upward

    • Rectus Abdominis:

    • Primary function is to compress abdomen.

    • Also aids in flexion and rotation of lumbar region.

    • Oblique Muscles:

    • External Obliques: Superficial, compress abdomen, flex vertebral body.

    • Internal Obliques: Deeper, also compress abdomen and flex.

    • Transversus Abdominis:

    • Assists in abdomen compression.

    • Rhomboids (Major/Minor):

    • Functions include adduction of scapula.

  • Intercostal Muscles

    • External Intercostals: Aids in inspiration by lifting ribs and expanding thoracic cavity.

    • Internal Intercostals: Aids in expiration by depressing rib cage.

  • Serratus Anterior:

    • Functions to protract shoulder and rotate upwards; known as "boxer's muscle."

  • Scapular Muscles

    • Infraspinatus: Lateral rotation of humerus.

    • Subscapularis: Medial rotation of humerus.

    • Supraspinatus: Abduction of shoulder (moving away from midline).

    • Teres Major/Minor:

    • Major: Medial rotation/extension.

    • Minor: Opposes major actions.

    • Trapezius: Helps with neck extension and scapula adduction.

  • Connective Tissue

    • Linea Alba: Connective tissue at midline of abdomen; supports abdominal muscles.

  • Muscle Identification

    • Study models for muscle location and actions as preparation for upcoming quizzes and practical exams.

    • Important to remember highlighted muscle functions for quiz preparation (true/false or matching questions).

  • Upper Limb Muscles

    • Flexor Carpi Radialis: Flexes wrist and aids in abduction of the hand.

    • Palmaris Longus: Flexes wrist.

    • Extensor Carpi Ulnaris: Helps in extension of wrist and aids in adduction of the hand.

    • Extensor Digitorum: Extension of fingers.

    • Emphasize understanding muscle names to infer function (e.g. "radialis" indicates abduction).

  • Next Steps for Study

    • Review all muscle functions and locations.

    • Label muscles in lab reports.

    • Focus on table of actions for muscles in upper limbs.

  • Final Notes

    • Use time effectively for review and in-depth understanding before proceeding to next labs.