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PT 510 Anatomy > Back Muscles > Flashcards

Back Muscles Flashcards

1
Q

Splenius Capitis

A

O: Arises from ligament nuchae and the SPs of C7-T4
I: Fibers run superolaterally to mastoid process of temporal bone and lateral third of superior nuchal line of occipital bone
N: Segmental PPRs
A: Acting alone, they laterally bend and ipsilateral rotation; together they extend the head and neck

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2
Q

Splenius Cervicis

A

O: Ligament Nuchae, SPs of T3-T6
I: Tubercles of TPs of C1-C3 or C4 vertebra
N: Segmental PPRs
A: Acting alone, they laterally bend and ipsilateral rotation; together they extend the head and neck

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3
Q

Interspinales

A

O: Superior surfaces of SPs of Cervical and Lumbar vertebrae
I: Inferior surfaces of SPs of vertebrae superior to vertebrae of origin
N: Segmental PPRs
A: Aid in extension and rotation of vertebral column; Proprioception

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4
Q

Intertransversarii

A

O: TPs of cervical and lumbar vertebrae
I: TPs of adjacent vertebrae
N: Segmental PPRs; Lateral group receives APR input
A: Aid in lateral bending of vertebral column; acting bilaterally they stabilize vertebral column; proprioception

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5
Q

Iliocostalis Lumborum

A

O: Middle Crest of Sacrum, Iliac Crests, SPs of T11-L5, Sacrotuberous and Post Sacroiliac Ligament, Thoracolumbar Fascia
I: Angles of Ribs 7-12
N: Segmental PPRs
A: Together they extend vertebral column/as back is flexed they control movement by gradually lengthening their fibers; Alone they laterally bend/ipsilateral rotation

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6
Q

Iliocostalis Thoracis

A

O: Angles of Ribs 7-12
I: Angles of Ribs 1-6, TP of C7
N: Segmental PPRs
A: Together they extend vertebral column/as back is flexed they control movement by gradually lengthening their fibers; Alone they laterally bend/ipsilateral rotation

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7
Q

Iliocostalis Cervicis

A

O: Angles of Ribs 3-6
I: TPs of C4-C6
N: Segmental PPRs
A: Together they extend vertebral column/as back is flexed they control movement by gradually lengthening their fibers; Alone they laterally bend/ipsilateral rotation

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8
Q

Longissimus Thoracis

A

O: TPs of L1-L5, Thoracolumbar Fascia
I: TPs of T1-T12, Ribs 3-12 between angles and tubercles
N: Segmental PPRs
A: Together they extend vertebral column/as back is flexed they control movement by gradually lengthening their fibers; Alone they laterally bend

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9
Q

Longissimus Cervicis

A

O: TPs of T1-T5
I: TPs of C2-C6
N: Segmental PPRs
A: Together they extend vertebral column/as back is flexed they control movement by gradually lengthening their fibers; Alone they laterally bend

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10
Q

Longissimus Capitis

A

O: TPs of T1-T5, Articular Processes of C4-C7
I: Mastoid Process of Occipital Bone
N: Segmental PPRs
A: Together they extend vertebral column/as back is flexed they control movement by gradually lengthening their fibers; Alone they laterally bend

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11
Q

Spinalis Thoracis

A

O: SPs of T11-T12
I: SPs of T4-T8
N: Segmental PPRs
A: Together they extend vertebral column/as back is flexed they control movement by gradually lengthening their fibers; Alone they laterally bend

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12
Q

Spinalis Cervicis

A

O: Ligament Nuchae, SPs C7-T2
I: SPs of C2-C4
N: Segmental PPRs
A: Together they extend vertebral column/as back is flexed they control movement by gradually lengthening their fibers; Alone they laterally bend

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13
Q

Spinalis Capitis

A

O: Blends with Semispinalis Capitis
I: Blends with Semispinalis Capitis at Occiput
N: Segmental PPRs
A: Together they extend vertebral column/as back is flexed they control movement by gradually lengthening their fibers; Alone they laterally bend

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14
Q

Semispinalis Thoracis

A

O: TPs of T6-T10(12)
I: SPs of C6-T4
N: Segmental PPRs
A: Extends Head and Thoracic and Cervical regions of vertebral column and rotates them contralaterally

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15
Q

Semispinalis Cervicis

A

O: TPs of T1-T6
I: SPs of C2-C5
N: Segmental PPRs
A: Extends Head and Thoracic and Cervical regions of vertebral column and rotates them contralaterally

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16
Q

Semispinalis Capitis

A

O: Articular Processes of C4-C7; TPs of C7-T7
I: Between superior and inferior nuchal lines of occipital bone
N: Segmental PPRs
A: Extends Head and Thoracic and Cervical regions of vertebral column and rotates them contra laterally

17
Q

Multifidus

A

O: Arises from Sacrum and Ilium, Mammilary Processes of Lumbar Vertebrae, TPs of T1-T3, and Articular Processes of C4-C7
I: Fibers pass superomedially to SPs of vertebrae above, spanning 2-4 segments up to C2
N: Segmental PPRs
A: Stabilize vertebra during local movements of vertebral column

18
Q

Rotatores

A

O: Arises from TPs of vertebra; are best developed in thoracic region
I: Pass super medially to attach to junction of lamina and TPs of vertebrae above their origin spanning 1-2 segments
N: Segmental PPRs
A: Stabilize vertebra and assist with local extension and rotatory movements of vertebral column; proprioception

PT 510 Anatomy (25 decks)

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