Lesson 8 | Finals Flashcards
Number of muscles in the body
600+
Main function of the muscles
Allows movement
Other term for muscle fibers
muscle cells
A bundled group of muscle fibers
Fascicle
Tendons vs ligaments
Tendons: Muscle to bone
Ligaments: Bone to bone
Types of muscles according to fascicle arrangement
Parallel
Fusiform
Circular
Pennate (Unipennate, Bipennate, Multipennate)
PFPC
Fascicles are parallel to the longitudinal axis of the muscle
Parallel muscles
Has flat sheet appearance
Parallel muscles
Examples of parallel muscles
Sternohyoid muscle
Sartorius muscle
Longest muscle in the body
Sartorius muscle
Middle region of a spindle-shaped muscle
Belly
Fascicles are nearly parallel; spindle-shaped
Fusiform
Shape of fusiform muscles
Spindle-shaped
Examples of fusiform
Biceps brachii
Explain what is a spindle shape
Narrow at both ends, wide towards the center
Fascicles in concentric circular arrangement form sphincter muscles
Circular
Fascicle arracngement of circular muscles
concentric circular arrangement
Examples of circular muscles
Orbicularis oculi
Orbicularis oris
Orbicularis oculi vs Orbicularis oris
Orbicularis oculi: encircles the eye
Orbicularis oris: encirces the mouth
Usually found encircling an orifice
Sphincter muscle
Orifice
opening
Other term for triangular muscles
Convergent
Fascicles are spread over a broad area
Triangular
Why are triangular muscles also called convergent muscles?
Fascicles converge into a narrow or a single point of tendon
Examples of triangular muscle
Pectoralis major
Short fascicles in relation to total muscle length
Pennate
Tendon extends nearly entire length of muscle
Pennate
Term that means feather-like appearance
Pena
Fascicles anchor only on one side of the tendon
Unipennate
Example of a unipennate
Extensor digitorum longus
Fascicles on both sides of tendons
Bipennate
Example of a bipennate
Rectus femoris
Fascicles insert on multiple tendons towards a common tendon
Multipennate
Example of a multipennate
Deltoid
Ways as to how muscles are named
- Shape
- No. of heads
- Points of attachment
- Direction of fibers
- Size of muscles
- Function
Ns PDFs
Naming muscles according to shape
- Deltoid
- Trapezius
- Serratus Anterior
- Rhomboid
- Orbicularis
- Pectinate/ Pectineus Muscle
- Piriformis
- Platys/ Platysma
- Quadratus Femoris
- Gracillis Muscle
STOP QR PGPD
Shape of deltoid muscle
Triangular
Shape of trapezius muscle
Trapezoid
Shape of serratus anterior
saw-toothed
Shape of rhombus muscle
rhomboid